Please help with chemistry? Urgent!

Posted on 2016-03-28 18:36:00 in Chemistry by MUHAMMAD

The capasity of a drying agent is the amount of water which can be removed per gram of drying agent in its anhydrous form. The four hydrates below are produced when used at room temperature. For which one is the capasity: Very high? High? Mediun or low? Why? 

I. Potassium carbonate dihydrate 
Ii. Calcuim sulfate hemihydrate (hemi is 1/2 )  
iii Sodium sulfate decahydrate 
iv. Calcuim chloride hexahydrate  

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