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Why do calcium ions make water hard but ...

Why do calcium ions make water hard but sodium ions do not ?

A

Calcium forms insoluble compounds with stearate ions present in soap

B

Sodium forms insoluble compounds with stearate ions present in soap

C

Calcium forms soluble compounds with stearate ions present in soap

D

Both calcium and sodium forms insoluble compounds with stearate ions present in soap

Text Solution

Verified by Experts

The correct Answer is:
A
Soaps are salt of sodium so sodium cannot reacts with soap to form insoluble compounds. But calcium can form insoluble compounds with stearate ions present in soap.
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