1. In attempting to determine the percentage of water in a hydrate, a lab group decided to
save time by heating for only 5 minutes instead of 10 minutes. The evaporating dish and
its contents were weighed at this time. A second heating was not performed. Do they risk
their percentage water calculation being too high or too low? Explain.
2. A lab group is rushed to complete their lab and after heating, they wait until the
following day to weigh what remains in the evaporating dish. What could happen that
would throw off results if a lab group delays weighing after heating?
