1. Michael is studying the factors that affect reactivity of metals. He wants to test the effect that different concentrations of an acid will have on the reaction of a metal with acid. As he sets
up and completes his experiment, which of the following experimental designs would be
most likely to help him answer his question?
A. Allow several metal samples to soak in different amounts of acid of a single concentration
and then measure the amount of metal lost on each.
B. Prepare solutions of different acid concentrations, measure 50 milliliters of each into
different beakers, and place metal samples of different types but of the same mass into
the beakers.
C. Prepare solutions of different acid concentrations, measure 50 milliliters of each into
different beakers, and place metal samples all the same type and mass into the beakers
for the same amount of time and then measure the mass lost.
D. After allowing a small metal sheet to be exposed to one acid concentration, place it in
different acid concentrations, then measure the surface area that is corroded.