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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georgeaidoo007, let's knock this out. 1a) Name the gas being tested for. The gas being tested for is oxygen gas. 1b) State the purpose of: i) Adding manganese(IV) oxide in step II. Manganese(IV) oxide acts as a catalyst to speed up the decomposition of hydrogen peroxide, producing oxygen gas more rapidly. ii) Testing the gas with a glowing splint in step IV. This test is used to confirm the presence of oxygen gas, as oxygen gas rekindles a glowing splint. 1c) State the observation in step IV and the conclusion drawn from it. Observation: The glowing splint rekindles* (bursts into flame). Conclusion: The gas collected is oxygen*. 2a) Read and record: i) Weight (W_1) of the wood in air. W_1 = 2\, N ii) Weight (W_2) of the wood in water. W_2 = 1\, N 2b) Calculate: i) Apparent loss of weight of the wood in water. Step 1: Use the formula for apparent loss of weight. Apparent loss of weight = W_1 - W_2 Step 2: Substitute the values and calculate. Apparent loss of weight = 2\, N - 1\, N = 1\, N ii) Relative density of the wood. Step 1: Use the formula for relative density. Relative density = Weight of wood in airApparent loss of weight in water Step 2: Substitute the values and calculate. Relative density = 2\, N1\, N = 2 2c) Explain the apparent loss of weight of the wood. The apparent loss of weight of the wood in water is due to the upthrust (or buoyant force) exerted by the water on the submerged wood. According to Archimedes' principle, this upthrust is equal to the weight of the water displaced by the wood. What's next?