Multiple Choice
Why might sodium carbonate (washing soda,Na2CO3) be added to hard water to aid in cleaning?
A) The hard ions in the water are more attracted to the carbonate ions -2 charge.
B) The hard ions are dissolved by the added sodium ions.
C) The soap gets softer due to the added ions.
D) The ions solubilize the soap due to ion-ion intermolecular attraction,which improves the cleaning ability.
E) none of the above
Correct Answer:
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