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..