Question

heating CuO powder to change its properties and acquiring more oxygen*** You can assume all of...

heating CuO powder to change its properties and acquiring more oxygen***

You can assume all of the sample has reacted to form the CuO product when the mass of the product changes by less than 1% from the previous weighing.

True

False

You can assume that all of the sample has reacted to form the CuO product after a single heating.

True

False

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Homework Answers

Answer #1

The yield of the product depends on the stoichiometry of the reaction and the purity of the starting material. Heating ensures that volatile impurities and water evaporate, leaving behind the purified CuO. Heating has no role in deciding the yield of the product. Hence, the given statement is false.

The given statement is true. Cu reacts with O2 over a narrow temperature range to form CuO. Usually, the mixture is heated at a high temperature to ensure that the product is formed.

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