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For the following questions and problems, answer the questions below (not between questions) showing all work and or give answers in complete sentences.
(Actually these questions are part of the Calculation sections).
1. Calculate the stoichiometric (theoretical) yield, experimental (actual) yield and percent yield for copper.
2. Give the complete balanced chemical reaction ( add another product, water, to the product side of reaction and its phase is liquid). Then show all work to get to the Net ionic reaction.
3. Using the complete chemical reaction (do not have to use coefficients or balance), show all work to determine what is oxidized, what is reduced, what is the oxidizing agent and what is the reducing agent.
Additional Questions
1. You added 100.mL of DI water to the 250. mL beaker and then added the Copper (II) chloride dihydrate. What is the function of the water? Is it OK to just use the scale on the side of the beaker to measure the amount of water added? Explain.
2. What caused the blue color in the aqueous reactant? What are the phase and color of each product.
3. What happened to the blue color from the reactant to the product. Do these observations support what your calculations determined to be the limiting reactant?
4. If in massing out the product, you spilled some of the copper product, how would the value of the percent yield be affected? Explain.
5. What is a hydrate? Is the water (called waters of hydrate) chemically bonded to the ionic compound? In calculating stoichiometric yield, why is important to know the number of waters of hydrate ( if in dihydrate, there are 2 waters of hydrate per formula unit of Copper (II) chloride).
6. What happens to the waters of hydrate once the hydrate is dissolved? What does anhydrous mean and what type of process (physical or chemical change) causes the hydrate to become anhydrous.