A. Difference in solubility of caso4 ½ h2o + caso4+ 2h2o B. Reaction between caso4+ 2h2o and water C. Nucleation and growth of caso4 ½ h2o crystals D. Reaction between hemihydrate and hihydrate
A. Testing the strength of plaster of paris B. Evaluating the setting time of plaster of pris C. Testing the metal hardness D. Testing the purity of noble metals