It is produced by two methods: The residue is black when hot and cold. In the battery industry, the lead powder used is oxidized to 75–85% and is called leady oxide. How many grams of oxygen are required to react with 29.9 g of lead(II) sulfide?c. Cities no longer install lead pipes. Lead has a low reactivity with oxygen. Mr Soanes shows you what happens when you burn things in oxygen. HA Value Units Submit Request Answer Part D How many grams of lead(II) sulfide are used to produce 12 lead(II) oxide? The Reaction of Metals with Air (Oxygen).. Potassium, sodium, lithium, calcium and magnesium react with oxygen and burn in air. This allotrope is termed as ozone. Each lead atom in 59is coordinated to four oxygen and two nitrogen atoms of the two tdci ligands, forming one 6-membered and two 5-membered chelate rings, and all six deprotonated oxygen atoms of the two tdci ligands act as bridges. Hydrogen molecules violently react with oxygen when the existing molecular bonds break and new bonds are formed between oxygen and hydrogen atoms. Answer: (i) Reaction with oxygen: Non-metals react with oxygen to form acidic oxides. Reaction with Elements. lead + oxygen ==> lead(II) oxide [lead monoxide] 2Pb(s) + O 2(g) ==> 2PbO(s) and 3Pb(s) + 2O 2(g) ==> Pb 3 O 4(s) Lead is oxidised, oxygen gain, oxidation reaction. These reactions are called combustion reactions. Most metals oxides are base anhydrides and react with acids. The carbon takes oxygen away from the lead oxide. In fact, lead sulfide was one of the earliest materials to be used as a semiconductor. Combination reactions that contain oxygen as a reactant can also be considered combustion. How many grams of lead(II) chloride would be made if 16 grams of Cl- ions react with ... Nitrogen monoxide will react with oxygen gas to produce nitrogen dioxide. When heated in oxygen, arsenic ignites in oxygen to form “arsenic pentoxide” – actually tetra arsenic decaoxide, As 4 O 10, and As 4 O 6. When solid lead(II) sulfide reacts with oxygen gas, the products are solid lead(II) oxide and sulfur dioxide gas. How many grams of oxygen are required to react with 29.9 g of lead(II) sulfide?c. Lead (II) sulfide, PbS, reacts with oxygen gas to produce lead (II)oxide and dioxide. Metal + oxygen → metal oxide (a) Metal undergoes oxidation to form positive ions. Lead is a reactive metal, but its reactivity is somewhat inhibited by the formation of an outer skin of protective compounds. it is an example of (a) combination reaction (b) oxidation reaction (c) decomposition reaction (d) reduction reaction 2 See answers sathunandhu2003 sathunandhu2003 Roasting, also called smelting, converts the ore to a compound of lead and oxygen, lead oxide (PbO 2). To take back the white colour, hydrogen peroxide is reacted with lead sulfide. Reduction: You will find that the rust remains suspended in … Under normal conditions lead does not react with water. (ii) K I - It liberates iodine from a solution of potassium iodide. At the same time, copper oxide is reduced because oxygen is removed from it. Some metals will react with oxygen when they burn. Lead react with oxygen to produce oxide lead (II). Lead is not a good conductor of electricity, heat, sound, or other pressure vibrations. Assertion: A lead nitrate on thermal decomposition gives lead oxide, brown coloured nitrogen dioxide and oxygen gas. The reactions with oxygen. Ozone is a source of atomic oxygen, producing free oxygen molecules. Collect a spoonful of rust and dissolve it in a very little amount of water. Express Your Answer As A Chemical Equation. oxide. Let us check the nature of rust formed as a result of the reaction between iron, oxygen and water. Lead oxide is then heated with charcoal (pure carbon). When both oxygen and water are present, metallic lead is converted to lead hydroxide (Pb(OH) 2): 2Pb(s)+ O 2 (g) + 2H 2 O(l) -> 2 Pb(OH) 2 (s) 4K + O 2 → 2K 2 O. Magnesium does not react with oxygen at room temperature but when heated it burns with bright light forming magnesium oxide. How many grams of oxygen are required to react with 26.0 g of lead (II) sulfide? Lead ions react with chloride ions to create a precipitate as represented by the reaction below: 2+ Pb (aq) + 2Cl-(aq) --> PbCl 2 (s) A. Solutions for Chapter 9 Problem 17QP: When lead(II) sulfide reacts with oxygen (O2) gas, the products are lead(II) oxide and sulfur dioxide gas.a. NCERT Exemplar Solutions for Class 10 Science Chapter 1 Short Answer Questions. During thermal oxidation of lead, first a PbO layer forms on the metal surface, followed by an oxidation reaction that proceeds via a solid-state mechanism, i.e. Question: When Solid Lead(II) Sulfide Reacts With Oxygen Gas, The Products Are Solid Lead(II) Oxide And Sulfur Dioxide Gas Write The Balanced Chemical Equation For The Reaction. See the alkali metals and alkaline earth metals.. Metals in the reactivity series from aluminium to copper react with oxygen in the air to form the metal oxide. However, when lead comes in contact with moist air reactivity with water increases. You will find that the rust remains suspended in … It is used as a pigment. Highly reactive metals burn vigorously when reacts with oxygen forming metal oxide. This page looks at the reactions of the Group 2 elements - beryllium, magnesium, calcium, strontium and barium - with air or oxygen. Reactions A. As the products of the reaction are at a lower energy level than the reactants, the result is an explosive release … Lead reacts with air, in the presence of moist and carbon dioxide, forming a passivating layer. When heated in a stream of air, lead burns : … It also requires two chemical reactions to occur within the furnace. Since reaction is quite slow due to less reactivity of lead, only bubbles of H 2 are seen to evolve. The general equation for this reaction is: metal + oxygen → metal oxide. In the above reactions, zinc (Zn) and magnesium (Mg) are more reactive than copper (Cu), hence they replace copper from its solution. Answer/Explanation. However, do note that when hydrochloric acid is being used, the initial reaction between lead and hydrochloric acid will form an insoluble layer of lead (II) chloride. Assertion: A lead nitrate on thermal decomposition gives lead oxide, brown coloured nitrogen dioxide and oxygen gas. The following is another redox reaction involving oxygen. Lead is a reactive metal, but its reactivity is somewhat inhibited by the formation of an outer skin of protective compounds. Thus the equation would be $\ce{PbS + 4O3 -> PbSO4 + 4 O2}$ Lead is a heavy, soft metal that is a solid at normal atmospheric and crustal pressures. See the alkali metals and alkaline earth metals.. Metals in the reactivity series from aluminium to copper react with oxygen in the air to form the metal oxide. Lead is found in Earth's crust at an abundance of about 13 – 20 parts per million. Q24- The reaction of H₂ gas with oxygen gas to form water is an example of A) Combination reaction B) Redox reaction C) Exothermic reaction ... Q44- In the decomposition of lead (II) nitrate to give lead (II) oxide, nitrogen dioxide and oxygen gas, the coefficient of nitrogen dioxide (in the balanced equation) is A) 1 … 3. Express your answer with the appropriate units. (b) Cobalt metal is heated with oxygen gas to give solid cobalt(III) oxide. lead + oxygen ==> lead(II) oxide [lead monoxide] 2Pb(s) + O 2(g) ==> 2PbO(s) and 3Pb(s) + 2O 2(g) ==> Pb 3 O 4(s) Lead is oxidised, oxygen gain, oxidation reaction. 2Mg + O 2 → 2MgO. 2Cu + O 2 2CuO. Reaction is given below –. Answer. 2. H 2 O, which can be turned into the anhydrous form by gentle heating: K 2 PbO 3 + 2 Pb (OCOCH 3) 2 … The balanced chemical equation for this reaction is 2 Pb (NO 3) 2 (s) produces 2 PbO (s) + 4NO 2 + O 2 (g). How many liters of oxygen gas at STP are required to react with 65.3 g of aluminum in the production of aluminum oxide? Write the balanced equation for the reaction.b. A small lead oxide (PbO) layer forms at the surface of the metal. This reaction is used in qualitative inorganic analysis. How many grams of oxygen are required to react with 29.9 g of lead(II) sulfide? When lead(II) nitrate is heated, it decomposes into lead (II) oxide, nitrogen dioxide and oxygen. See the alkali metals and alkaline earth metals.. Metals in the reactivity series from aluminium to copper react with oxygen in the air to form the metal oxide. Lead oxide is then heated with charcoal (pure carbon). In the battery industry, the lead powder used is oxidized to 75–85% and is called leady oxide. Zinc metal reacts with chromium(III) nitrate in a single replacement reaction. - The ozone molecule cleaves the C = C double bond and gives formaldehyde and oxygen gas. The reaction proceeds at room temperature. Assertion: A lead nitrate on thermal decomposition gives lead oxide, brown coloured nitrogen dioxide and oxygen gas. Under normal conditions lead does not react with water. It is reactive and forms oxides with every element except helium, neon, krypton, and argon. Copper: Copper glows faintly. The following is another redox reaction involving oxygen. 17. But due to presence of H 2 S, PbCO 3 is turned to black colour PbS. (a) Zinc undergoes oxidation because it gains oxygen to form zinc oxide. if oxygen is available it will be used as a terminal electron acceptor because it has a large free energy difference VII. Only upon heating lead to 600-800°C does lead react with oxygen in air to from lead oxide, PbO. Facts about calcium, and the reaction of calcium with oxygen Physical and chemical properties of calcium. Group 1 metals are very reactive, and must be stored out of contact with air to prevent oxidation. Write a balanced equation for the decomposition of hydrogen peroxide. In these reactions, CaCO 3 is a flux, and its ... pressure of oxygen will be in equilibrium with the … Analysis of the reaction mixture would show. A + O 2 → C(s) + O 2(g) → CO 2(g) + energy ... One example of a double displacement reaction is the reaction of lead (II) nitrate with potassium iodide to form lead (II) iodide and potassium nitrate: 1) Due to the sulfur content, carbon from the coke will not be able to reduce lead. When heated in a stream of air, lead burns : … Note that lead should react easily with dilute acids since it is higher than hydrogen in the Reactivity Series.. AXO O ? Chemistry Q&A Library When solid lead(1I) sulfide reacts with oxygen gas, the products are solid lead(II) oxide and sulfur dioxide gas. So, lead(II) oxide is the oxidising agent in this redox reaction. How many grams of oxygen are required to react with 29.9 g of lead(II) sulfide? In this tutorial, we will learn how to balance this reaction and uses of it. Lithium burns with a strongly red-tinged flame if heated in air; in pure oxygen, the flame is more intense. On the whole, the metals burn in oxygen to form a simple metal oxide. It also requires two chemical reactions to occur within the furnace. Share Tweet Send [Deposit Photos] In ancient times, people used calcium compounds for building, mainly calcium carbonate, which was found in rocks, or lime, which was made from baking it. Lead (II) sulfide react with oxygen 2PbS + 3O 2 2PbO + 2SO 2 [ Check the balance ] Lead (II) sulfide react with oxygen to produce oxide lead (II) and sulfur dioxide. The Reactions with Oxygen Lithium. (c) exothermic reaction. Question 15. Let us check the nature of rust formed as a result of the reaction between iron, oxygen and water. Aluminium is the fastest and copper is the slowest of the six. B. - The ozone molecule cleaves the C = C double bond and gives formaldehyde and oxygen gas. So, in 'mild' conditions only one oxygen per ozone molecule would react as a strong oxidizer, and the remaining molecular oxygen would require elevated temperatures to react. Most metals oxides are base anhydrides and react with acids. 2Pb (NO3)2 = 2PbO + 4NO2 + O2. Using a metal and an acid to produce hydrogen and a salt. Watch the video below to see the correct … It also dissolves in glacial acetic acid and a diluted mixture of nitric acid and hydrogen peroxide. A chemical reaction that involves gain of oxygen or loss of hydrogen is known as oxidation. When solid lead(II) sulfide reacts with oxygen gas, the products are solid lead(II) oxide and sulfur dioxide gas. (a) Zinc undergoes oxidation because it gains oxygen to form zinc oxide. There are two oxides for lead. Trioxygen is the most reactive allotrope of oxygen that would cause damage to lung tissue. The layer is most likely lead hydroxy carbonate. Lead (II) nitrate is also called lead nitrate or plumbous nitrate. NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations includes all the important topics with detailed explanation that aims to help students to understand the concepts better. Mr Soanes shows you what happens when you burn things in oxygen. Lead is not a good conductor of electricity, heat, sound, or other pressure vibrations. Lead (II) sulfide react with oxygen to produce oxide lead (II) and sulfur dioxide. This reaction takes place at a temperature near 1200°C. Lead is reactive with oxygen and tarnishes and dulls when in contact with oxygen. Assertion: A lead nitrate on thermal decomposition gives lead oxide, brown coloured nitrogen dioxide and oxygen gas. It's fairly non-reactive, though at high enough temperatures it will react with atmospheric oxygen to form lead (II) oxide and sulfur dioxide. Hydrogen molecules violently react with oxygen when the existing molecular bonds break and new bonds are formed between oxygen and hydrogen atoms. Look at it from a redox reaction perspective. oxygen in the lead that reacts with the conta ining material, as well as liquid metal . This does make sense because lead oxide is commonly used as an oxidizing agent and hydrogen gas is considered to be a powerful reducing agent. (a) K2O + H2O → 2 KOH (b) Synthesis 14. The following is another redox reaction involving oxygen. Lead oxides are insoluble with water. Lead is a heavy, soft metal that is a solid at normal atmospheric and crustal pressures. The presence of hydrogen sulfide or sulfide ions may be tested using "lead acetate paper." Lead has a slow reaction when heated in air to form red/yellow lead(II) oxide and tri-lead tetroxide . 2Mg + O 2 → 2MgO. But due to presence of H 2 S, PbCO 3 is turned to black colour PbS. (a) C6H12O6 + 6 O2 → 6 CO2 + 6 H2O (b) Combustion 13. (b) Lead(II) oxide causes zinc to be oxidised. Word Equation: Lead (II) Sulfide + Oxygen à Lead (II) Oxide + Sulfur Dioxide. Chemical Equation: 2PbS + 3O2 à 2PbO + 2SO2. 2) The newly formed Lead (II) Oxide subsequently reacts with coke to attain refined Lead [2]. Lead and oxygen react to produce lead oxide by heating, lead is an active metal. Jan 20 2021 03:42 PM. Liquid oxygen is slightly paramagnetic. Early attempts to incorporate recombination into lead-acid batteries were unsuccessful because of excessive cost, size, and/or complexity, and none were effectively commercialized. The carbon takes oxygen away from the lead oxide. Importance of PbS and H 2 O 2 reaction. The word reduction comes from the “to lead … The reaction of H 2 gas with oxygen gas to form water is an example of. Reason: Lead nitrate reacts with potassium iodide to form yellow ppt of lead iodide and the reaction is double displacement as well as precipitation reaction. Lead oxides are insoluble with water. Under normal conditions lead does not react with water. Question 4. Lead nitrate is formed by reacting lead with nitric acid, so by displacement reaction it forms, lead nitrate ,water and nitrigon di oxide. Lead has a slow reaction when heated in air to form red/yellow lead(II) oxide and tri-lead tetroxide . The Reaction of Metals with Air (Oxygen).. Potassium, sodium, lithium, calcium and magnesium react with oxygen and burn in air. How many grams of sulfur dioxide can be produced when 61.0 g of lead (II) sulfide reacts? Ans) The formation of Sulphur trioxide from sulphur dioxide and oxygen is a combination reaction in which a compound reacts with an element . However, it is soluble in hydrochloric acid present in the stomach, and is therefore toxic when ingested. When copper is heated it combines with oxygen to form copper oxide. Copper(II) oxide is formed. One is lead(II) oxide, another one is lead (IV) oxide. The Reaction of Metals with Air (Oxygen).. Potassium, sodium, lithium, calcium and magnesium react with oxygen and burn in air. (a) Zinc undergoes oxidation because it gains oxygen to form zinc oxide. 12. To take back the white colour, hydrogen peroxide is reacted with lead sulfide. The soluble oxides dissolve in water to form solutions of hydroxides. In this reaction, carbon is oxidised because it gains oxygen. When lead (II) nitrate is heated, it decomposes into lead (II) oxide, nitrogen dioxide and oxygen. 2 H2O2 2 H2O (l) + O2 (g) Activity 3: Single-Replacement Reaction 1. Write the balanced equation for the reaction.b. Lead reacts with air, in the presence of moist and carbon dioxide, forming a passivating layer. Lead is a heavy, soft metal that is a solid at normal atmospheric and crustal pressures. Mercury does not react with non-oxidizing acids but does react with concentrated nitric acid, HNO 3, or concentrated sulphuric acid, H 2 SO 4, to form mercury(II) compounds together with nitrogen or sulphur oxides. Like the related materials PbSe and PbTe, PbS is a semiconductor. 2Mg + O 2 → 2MgO In this reaction, oxygen is added to magnesium and therefore, magnesium is oxidized. Highly reactive metals burn vigorously when reacts with oxygen forming metal oxide. When the reaction is complete, grey lead metal is left in the crucible. Heating the metal or metal oxide in oxygen may lead to the formation of peroxides and superoxides. Potassium oxide reacts with water to produce potassium hydroxide. But most of them do this on ignition. Solutions for Chapter 9 Problem 17QP: When lead(II) sulfide reacts with oxygen (O2) gas, the products are lead(II) oxide and sulfur dioxide gas.a. Small pieces of sodium burn in air with a faint orange glow. A small lead oxide (PbO) layer forms at the surface of the metal. Write the balanced chemical equations for the following reactions and identify the type of reaction in each. This reaction takes place at a temperature of over 600°C. First, write a balanced equation. This is an example of oxidation. PbO2 + NaOH + 2 H2O → Na2[Pb (OH)6] lead dioxide reacts with hot acids, since Pb4+ cation is very instable, it converts in to stable Pb2+ state and oxygen is liberated. As the products of the reaction are at a lower energy level than the reactants, the result is an explosive release … Oxidation is the gain of oxygen. Share Tweet Send [Deposit Photos] In ancient times, people used calcium compounds for building, mainly calcium carbonate, which was found in rocks, or lime, which was made from baking it. The reactivity of the metal determines which reactions the metal participates in. Therefore, the mineral must be roasted to oxidize sulfur and create a metal oxide out of galena. The free energy depends on the energy difference between the reactants and the products. The Facts. Reaction of metals with Oxygen: Highly reactive metals. Copper has a lower reactivity with oxygen than lead. 4Al + 3O 2 2Al 2 O 3. This reaction is a redox reaction. This does make sense because lead oxide is commonly used as an oxidizing agent and hydrogen gas is considered to be a powerful reducing agent. 2Pb (s) + O 2 (g) → 2PbO (s) Finely divided lead powder is pyrophoric, however, meaning it is a fire risk. by diffusion of oxygen vacancies through the PbO layer. This corrosion occurs when oxidants, such as dissolved oxygen or chlorine disinfectant, react with elemental iron, lead, or copper in the pipes. Lead is not a good conductor of electricity, heat, sound, or other pressure vibrations. oxygen in the lead that reacts with the conta ining material, as well as liquid metal . form bases. 57. Complete the following reactions of iron and magnesium with oxygen. Write a balanced chemical equation for each of the following combination reactions: (a) Lead metal is heated with oxygen in air to yield solid lead(IV) oxide. When lead nitrate is heated, it due to thermal decomposition gives out metal oxide, oxygen and nitrogen dioxide. Facts about calcium, and the reaction of calcium with oxygen Physical and chemical properties of calcium. Write the balanced chemical equation for the reaction. The reaction tested negative for oxygen. This reaction occurs in Note that lead should react easily with dilute acids since it is higher than hydrogen in the Reactivity Series. Continued. lead + oxygen ==> lead(II) oxide [lead monoxide] 2Pb(s) + O 2(g) ==> 2PbO(s) and 3Pb(s) + 2O 2(g) ==> Pb 3 O 4(s) Lead is oxidised, oxygen gain, oxidation reaction. The balanced chemical equation for this reaction is 2 Pb (NO3)2 (s) produces 2 PbO (s) + 4NO2 + O2 (g). This reaction is used in qualitative inorganic analysis. In the above reactions, zinc (Zn) and magnesium (Mg) are more reactive than copper (Cu), hence they replace copper from its solution. Reaction of mercury with acids. The reaction of oxygen to platinum is essential in the sustainable energy sector and in improving air quality. I'm not sure what the parameters the reaction is taking place under but the Pb is going from Pb2+ to just Pb. Note that lead should react easily with dilute acids since it is higher than hydrogen in the Reactivity Series. If 0.500 moles of O2 were consumed using this chemical reaction, how much of lead (II)would be produced? When lead (II) nitrate is heated, it decomposes into lead (II) oxide, nitrogen dioxide and oxygen. Oxygen-recombination chemistry has been wedded to traditional lead-acid battery technology to produce so-called sealed, or valve-regulated, lead-acid products. Metals can react with water, acid and oxygen. Complete the following reactions of iron and magnesium with oxygen. 2. These reactions are called combustion reactions. : Consider the reaction in which magnesium ribbon burns in air forming magnesium oxide. This shows that not all collisions between oxygen and iron particles lead to a reaction taking place. If 0.500 moles of O2 were consumed using this chemical reaction, how much of lead (II)would be produced? (c) At the same time, lead(II) oxide undergoes reduction because it loses its oxygen to zinc. Only upon heating lead to 600-800°C does lead react with oxygen in air to from lead oxide, PbO. Analysis of the reaction mixture would show. A chemical reaction is the process in which reactants react chemically and convert into products by chemical transformation. Question 11. Combination Reaction of a Metal and Oxygen Gas. Iron has a medium reactivity with oxygen. The presence of hydrogen sulfide or sulfide ions may be tested using "lead acetate paper." Reason: Lead nitrate reacts with potassium iodide to form yellow ppt of lead iodide and the reaction is double displacement as well as precipitation reaction. The reader is cautioned that the following chemical reactions are overly simplified versions of the actual processes. Lead is reactive with oxygen and tarnishes and dulls when in contact with oxygen. ... [13] “Hysteresis effects in the hydrogen evolution reaction at lead in aqueous perchloric . Question 19. Suppose 30.00 g of lead and 1.56 g of sulfur are allowed to react. This reaction takes place at a temperature of over 600°C. It is used as a pigment. Reactions A. (a) displacement reaction. In order to obtain very pure tin, however, one problem must be solved. Lead (II) sulfide, PbS, reacts with oxygen gas to produce lead (II)oxide and dioxide. B. Gibbs free energy of reaction - Determines which reactions are most energetically favorable PbCO 3 is a white inorganic compound. Lead sulfide (PbS) reacts with hydrogen peroxide ( H 2 O 2) and produce lead sulfate (PbSO 4) and water as products.. B. Gibbs free energy of reaction - Determines which reactions are most energetically favorable 69.9 g 2SO 2 (g) + O 2 (g) → 2SO 3 (g) 10) A rod of metal X is placed in an aqueous solution of lead nitrate. Descriptions of the oxygen cycle functioning in sealed lead-acid systems sounds like descriptions of a nickel-cadmium cell: the The oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are the primary half-reactions that occur at the anode and cathode respectively in … Therefore, the mineral must be roasted to oxidize sulfur and create a metal oxide out of galena. For example, when a freshly cut piece of lead metal is exposed to the air, it quickly reacts with oxygen to form a thin outer layer of lead oxide. Using larger amounts of sodium or burning it … Write the balanced chemical equation for the reaction. 12. Combination reactions that contain oxygen as a reactant can also be considered combustion. 1) Due to the sulfur content, carbon from the coke will not be able to reduce lead. 12. (b) redox reaction. Some metals will react with oxygen when they burn. The residue is brown when hot and yellow when cold. How many grams of sulfur dioxide can be produced when 65.0 g of lead(II) sulfide reacts?d. Lead (II) nitrate is also called lead nitrate or plumbous nitrate. How does this relate to energy? Lead is found in Earth's crust at an abundance of about 13 – 20 parts per million. In the process of obtaining lead from PbS, or galena, the galena is "roasted" (heated in the presence of oxygen), so that the following reaction occurs: 2PbS(s) + 3O 2(g) → 2PbO(s) + 2SO 2(g) If 50.0 g of PbS reacts with 25.0 g of oxygen, how many grams of PbO will be formed? Answer. ... [13] “Hysteresis effects in the hydrogen evolution reaction at lead in aqueous perchloric . Lead is reactive with oxygen and tarnishes and dulls when in contact with oxygen. Lead ions react with chloride ions to create a precipitate as represented by the reaction below: 2+ Pb (aq) + 2Cl-(aq) --> PbCl 2 (s) A. What gases could be produced from hydrochloric acid (HCl)? The reaction of oxygen to platinum is essential in the sustainable energy sector and in improving air quality. But most of them do this on ignition. Question 4. 4As(s) + 5O 2 (g) → As 4 O 10 (s) 4As(s) + 3O 2 (g) → As 4 O 6 (s) Reaction of arsenic with water. Identify All Of The Phases In Your Answer. Answer: b Explanation: This is an effect of the preferred oxidation state of lead being +2 rather than +4. Heating the metal or metal oxide in oxygen may lead to the formation of peroxides and superoxides. However, do note that when hydrochloric acid is being used, the initial reaction between lead and hydrochloric acid will form an insoluble layer of lead (II) chloride. 4Na + O 2 → 2Na 2 O. Oxidation is the gain of oxygen. (i) P bS - Ozone oxidises lead sulphide to lead sulphate. Lead(II) oxide is formed. Lead (IV) oxide decomposes into lead (II) oxide and oxygen gas.
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