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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Here are the solutions to the questions: 16.(a) State and explain two observations made when magnesium ribbon is lowered into a gas jar full of carbon (IV) oxide (3mk) Observation 1: The magnesium ribbon continues to burn with a bright white flame*. Explanation: Magnesium is a very reactive metal and is able to reduce carbon(IV) oxide, continuing to burn even in the absence of oxygen. Observation 2: A white solid (magnesium oxide) and black specks* (carbon) are formed. Explanation: Magnesium reacts with carbon(IV) oxide to form white magnesium oxide and black carbon. 16.(b) Write a balanced chemical equation for the reaction that took place in a) above. 2Mg(s) + CO_2(g) heat 2MgO(s) + C(s) 17. The energy level diagram below shows the effect of a catalyst on the reaction. 17.(a) What does point M represent? (1Mk) Point M represents the activated complex (or transition state) of the uncatalyzed reaction. The energy difference from the reactants to point M is the activation energy of the uncatalyzed reaction.