Question

write down the quantity of mga 21 gram of sample of CdSO4•nH2O heated 15.4 gram of the anhydrous salt remains . what is the value of n and percentage of water?​

Answer 1

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Weight of salt =13.4 g

Weight of H

2

O=6.3 g

Weight of anhydrous salt =13.4−6.3=7.1 g

Moles of anhydrous salt =

142

7.1

=0.05 moles

Moles of H

2

O=

18

6.3

=0.35 moles

0.05 moles of anhydrous salt =0.35 moles of H

2

O

1 moles of anhydrous salt =

0.05

0.35

=7 moles