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1 Explain why hydrogen gas 'pops'when a lighted splint is applied. [2 marks] 2. a Write a word equation for the reaction of magnesium carbonate plus dilute sulfuric acid, which produces carbon dioxide gas. [1 mark] b Look at the apparatus in the Practical box Testing for carbon dioxide gas! Carbon dioxide gas is denser than air. Suggest an alternative way to collect the gas from the reaction in part a and to test it with limewater. [3 marks] 3 During the electrolysis of a chloride solution, a student predicted that a mixture of chlorine and oxygen gases would be given off from the anode. Suggest how you could test this prediction. [6 marks] 4 a i Write a balanced symbol equation, including state symbols, to describe the reaction between magnesium and dilute hydrochloric acid, to produce hydrogen gas. [3 marks] (H) ii Write an ionic equation, including state symbols, for the reaction in part i. [3 marks] (H) b In the reaction in part a, which species is reduced and which is oxidised? Explain your answer. [4 marks]

Question

1 Explain why hydrogen gas 'pops'when a lighted splint is applied. [2 marks] 2. a Write a word equation for the reaction of magnesium carbonate plus dilute sulfuric acid, which produces carbon dioxide gas. [1 mark] b Look at the apparatus in the Practical box Testing for carbon dioxide gas! Carbon dioxide gas is denser than air. Suggest an alternative way to collect the gas from the reaction in part a and to test it with limewater. [3 marks] 3 During the electrolysis of a chloride solution, a student predicted that a mixture of chlorine and oxygen gases would be given off from the anode. Suggest how you could test this prediction. [6 marks] 4 a i Write a balanced symbol equation, including state symbols, to describe the reaction between magnesium and dilute hydrochloric acid, to produce hydrogen gas. [3 marks] (H) ii Write an ionic equation, including state symbols, for the reaction in part i. [3 marks] (H) b In the reaction in part a, which species is reduced and which is oxidised? Explain your answer. [4 marks]

1 Explain why hydrogen gas 'pops'when a lighted splint is applied. [2 marks] 2. a Write a word equation for the reaction of magnesium carbonate plus dilute sulfuric acid, which produces carbon dioxide gas. [1 mark] b Look at the apparatus in the Practical box Testing for carbon dioxide gas! Carbon dioxide gas is denser than air. Suggest an alternative way to collect the gas from the reaction in part a and to test it with limewater. [3 marks] 3 During the electrolysis of a chloride solution, a student predicted that a mixture of chlorine and oxygen gases would be given off from the anode. Suggest how you could test this prediction. [6 marks] 4 a i Write a balanced symbol equation, including state symbols, to describe the reaction between magnesium and dilute hydrochloric acid, to produce hydrogen gas. [3 marks] (H) ii Write an ionic equation, including state symbols, for the reaction in part i. [3 marks] (H) b In the reaction in part a, which species is reduced and which is oxidised? Explain your answer. [4 marks]

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RalphProfessional · Tutor for 6 years

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<p> <br />1. This is due to the fact that Hydrogen is a combustible gas, and it burns rapidly in the presence of a spark or heat, causing a small explosion which is heard as the 'pop' sound.<br />2a. Magnesium carbonate + Sulfuric acid --> Magnesium sulfate + Carbon Dioxide + Water<br />2b. You could invert a test tube or gas jar over reacting test tube, so the carbon dioxide gas displaces the air.<br />3. Expose the gaseous final product to a glowing rekindled splint. If the splint maintains its anew glow and eventually went out, the presence of both Chlorine and Oxygen is detected.<br />4a. Mg(s) + 2HCl(aq) –> MgCl2(aq) + H2(g)<br />4b. In the provided reaction, Hydrogen ion, \(H(^{+}\)) is reduced and Magnesium ion ( \(Mg^{2+}\)) gets oxidised. </p>

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<p> <br />1. Hydrogen is a combustible gas. A 'pop' sound is heard when a burning splint comes in contact with hydrogen gas because of its rapid combustion in the presence of heat, causing a mini explosion. The energy from the burning splint provides the necessary activation energy for the reaction to proceed, producing water vapor and releasing energy in the form of sound and light, characterized by the 'pop' sound.<br />2a. A reaction between magnesium carbonate and sulfuric acid will result in the formation of magnesium sulfate, carbon dioxide, and water. These are chemical changes depicted in a word equation as: Magnesium carbonate + Sulfuric acid -> Magnesium sulfate + Carbon dioxide + Water<br />2b. Carbon dioxide can be collected by direct collection that exploits the concept that Carbon dioxide is denser than air. You could invert a test tube or gas jar over the reaction to allow the carbon dioxide to displace the air.<br />3. To find out the answer you will use another method acquired in high school chemistry: exposing the gaseous final product to a glow, then rekindling the smouldering splint. The glow on the slpwill would suggest the existence of both gases as Oxygen rekindles a glowing splint, & Chlorine gas extinguishes a burning splint.<br />4a. The reaction of Magnesium with dilute hydrochloric acid produces magnesium chloride and hydrogen gas as per the balanced symbol equation: Mg(s) + 2HCl(aq) –> MgCl2 (aq) + H2(g).<br />4b. In the provided reaction, Hydrogen gains electrons and is thus reduced. Conversely, Magnesium loses electrons and is thereby oxidised.</p>
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