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5. What color is phenolphthalein indicator: (a) in an acidic solution? (b) in a basic solution? 6. Based on the mint date, which of following

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5. What color is phenolphthalein indicator: (a) in an acidic solution? (b) in a basic solution? 6. Based on the mint date, which of following pennies cannot be used in this experiment: 1975 , 1995, or 2015? 7. A 2017 penny has a mass of 2.542g and produces a copper shell with a mass of 0.065g. Refer to Example Exercise 10.1 and find the (a) %Cu and (b) %Zn in the penny. 8. What safety precautions must be observed in this experiment

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