This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Step 1: Identify Gas K. Gas K burns with a blue flame and a pop sound. This is a characteristic test for hydrogen gas. a) (i) Gas K: Hydrogen Step 2: Identify Liquid T. Gas K (hydrogen) reacts with heated Lead (II) Oxide (PbO). Hydrogen is a reducing agent. It will reduce PbO to lead (Pb) and form water (H_2O). Liquid T is the product of this reaction that is liquid at room temperature. a) (ii) Liquid T: Water Step 3: Write the balanced chemical equation for the reaction. The reaction is between hydrogen gas (H_2) and lead (II) oxide (PbO). Hydrogen reduces lead (II) oxide to lead metal (Pb) and forms water (H_2O). H_2(g) + PbO(s) Pb(s) + H_2O(l) b) Equation: H_2(g) + PbO(s) Pb(s) + H_2O(l) Step 4: Explain why gas K is passed through the combustion tube before heating starts. Gas K (hydrogen) forms an explosive mixture with air (oxygen). Passing hydrogen through the tube before heating starts removes all the air from the tube, preventing an explosion when the hydrogen is heated. c) Reason: Hydrogen gas forms an explosive mixture with air. Passing hydrogen through the tube before heating removes air, preventing an explosion. Send me the next one 📸