The document discusses how the results for the percent of water in a hydrate and its formula would change if moisture from the air is absorbed by a hot dry sample upon cooling. For example, anhydrous calcium sulfate turns into calcium sulfate pentahydrate, increasing the water content percentage and altering its empirical formula to include 5 H2O. This demonstrates the effect of environmental humidity on hydration states in chemical compounds.

1. Help Please. Results not given Explain how your results for the percent of water in the hydrate
and the formula of the hydrate would be changed if water from the air were absorbed by the hot
dry sample as it cools. Be specific and justifty your answer.
Solution
For example take calcium sulphate anhydrous form which is black in color upon cooling changes
to blue which is calcium sulphate penta hydrate . The percent of water content increases and also
5 H2O is added in the empirical formula.