Use the EDTA titre to calculate the number of moles of Ca$2+$ and Mg$2+$ ions present in $25\mathrm{.}00$ml dilute sea water the ratio of magnesium to calcium ions in sea water is known to be close to $5$:$1.$ using this ratio, calculate the number of each

moles of both Ca$2+$ and Mg$2+$

moles of Mg $2+$

moles of Ca$2+$