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Science Clinic => Chemistry => Topic started by: Metfan725 on Jul 8, 2021

Title: "Washing soda" (sodium carbonate) may be used to "soften" water by the removal of certain ions that ...
Post by: Metfan725 on Jul 8, 2021

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

Ca²⁺(aq) + CO₃^2-(aq) → CaCO₃(s)

What mass of sodium carbonate would be required to remove essentially all of the calcium ion from 750 L of solution containing 43 mg Ca²⁺ per liter?
◦ 85 g
◦ 67 g
◦ 12 g
◦ 48 g
◦ 22 g

Title: "Washing soda" (sodium carbonate) may be used to "soften" water by the removal of certain ions that ...
Post by: Ksanderson1296 on Jul 8, 2021

85 g