Washing soda sodium carbonate may be used to soften water, Chemistry

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Washing soda sodium carbonate may be used to soften water

"Washing soda" (sodium carbonate) may be used to "soften" water by removal of certain ions that would otherwise react with common soaps. When the "hardiness" is due to calcium ion, the "softening" process may be represented as:

Ca^2+ (aq) + CO3^2- (aq) ---> CaCO3 (s)

What mass of sodium carbonate would be required for removal of essentially all of the calcium ion from 750L of sodium containing 43 mg Ca^2+ per liter?

A. 67g

B. 12g

C. 48g

D. 85g

E. 22g

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Chemistry: Washing soda sodium carbonate may be used to soften water

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Chemistry: Washing soda sodium carbonate may be used to soften water

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