174 DIY Science: Illustrated Guide to Home Chemistry Experiments
RQEWEvI UESTIOnS
q 1 : Would you expect the reaction rate of iron with hydrochloric acid to be faster or slower than the rate you observed for aluminum
with hydrochloric acid? Why?
q: 2 U.S. pennies made after 1982 consist of a zinc core with thin copper plating. What reaction would you expect if you dropped an
uncirculated U.S. penny into concentrated hydrochloric acid? Why? If testing a badly worn and scratched coin had different results,
how would you explain that difference?
q: 3 In Part II, if you had submerged a silver teaspoon in a copper sulfate solution, what reaction would you expect? Why?
q: 4 Brass is an alloy (mixture) of copper metal and zinc metal. If you added brass filings to a solution of concentrated hydrochloric
acid, what reaction(s) would you expect to occur and what products would you expect the reaction(s) to produce?
FIGURE 9-4:
Metallic copper plated on an iron nail by displacementdISoALp S : All of the waste solutions can be flushed
down the drain with plenty of water. dispose of the solid
waste with household waste.