Question

a 21 g of CdSO4•nH2O is heated and 15.4 gram of anhydrous salt remains. what is the value of n and the percentage of water?​

Answer 1

weight of salt :13.4g

weight of h20:6.3g

moles of anhydrous salt: 13.4-6.3:7.1

7.1/142:0.05moles

0.05 moles of anhydrous salt :0.35/0.05:7 moles