The concentration of Ca2+ in a particular water supply is 5.7×10−3M. The concentration of bicarbonate ion, HCO−3, in the same water is 1.7×10−3M. What masses of Ca(OH)2 and Na2CO3 must be added to 5.6×107L of this water to reduce the level of Ca2+ to 23% of its original level?
If you could show the work please that would be fantastic!!!