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.
ScanSolve AI Answer
Welcome back — been a while! Let's pick up where you left off. Here are short notes on each of the given equations, including the reaction type and observations. a) 2KBr(aq) + Cl_2(aq) 2KCl(aq) + Br_2(aq) This is a displacement reaction. Chlorine is more reactive than bromine, so it displaces bromine from potassium bromide. Observations: The colorless potassium bromide solution reacts with greenish-yellow chlorine gas. A reddish-brown solution of bromine is formed. b) CuO(s) + H_2(g) Cu(s) + H_2O(l) This is a redox reaction (specifically, a reduction reaction for CuO and oxidation for H_2). Hydrogen reduces copper(II) oxide to copper. Observations: Black solid copper(II) oxide turns into a reddish-brown solid (copper metal). Colorless hydrogen gas is consumed, and colorless liquid water is produced. c) CH_2=CH_2(g) + H_2(g) CH_3CH_3(g) This is an addition reaction (specifically, hydrogenation). Ethene reacts with hydrogen in the presence of a catalyst (e.g., nickel) to form ethane. Observations: Ethene gas reacts with hydrogen gas to form ethane gas. If a catalyst like nickel is used, the reaction typically occurs at elevated temperatures and pressures. There are no visible color changes as all reactants and products are colorless gases. d) CH_3CH_2OH(aq) + CH_3COOH(aq) CH_3COOCH_2CH_3(aq) + H_2O(l) This is an esterification reaction (a type of condensation reaction). Ethanol reacts with ethanoic acid in the presence of a strong acid catalyst (e.g., concentrated sulfuric acid) to form ethyl ethanoate and water. It is a reversible reaction. Observations: Ethanol and ethanoic acid, both colorless liquids, react to form ethyl ethanoate, which is a colorless liquid with a fruity smell, and water. The reaction is typically carried out by heating the mixture. Send me the next one 📸