Chemistry WAEC

Which of the following is used as water softener?

A. Na2CO3.10H2O
B. CuSO4. 5H2O
C. MgSO4. 7H2O
D. CaCI2.2H2O
E. Na2SO4. 10H2O

Correct Answer:

Option A – Na2CO3.10H2O

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