In the titration of $25\mathrm{.}00mL$ of a water sample, it took $19\mathrm{.}490mL$ of $3\mathrm{.}780{10}^{-3}M$ EDTA solution to reach the endpoint.

Calculate the number of moles of EDTA required to titrate the water sample. $($enter your answer with $3$ significant figures$)$

$7\mathrm{.}37{10}^{-5}$

You are correct.

Your receipt no$.$ is $153-1086(?)$ Previous Tries $(5)$

bottled water sample titrated. $($enter your answer with $3$ significant figures$)$

Tries $1/99$ Previous Tries

$CaC{O}_3$ present in the titrated sample of water, assuming that all the $C{a}^{2+}$ combines with $C{O}_3^{2-}.($enter your answer with $3$ significant figures$)$

Submit Answer Tries $0/99$

Calculate the number of grams of $CaC{O}_3$ present and convert to $mg.($enter your answer with $3$ significant figures$)$

$\frac{?}{\text{b}\text{a}\text{r}}($ Tries$\frac{0}{99})$

Convert the number of $mL$ of bottled water used in each sample titration to Liters. $($enter your answer with $3$ significant figures$)$

Tries $\frac{0}{99}$

Calculate the ppm of $CaC{O}_3=$mgCaCO $/$ Liters $H_{2}O$ used. $($enter your answer with $3$ significant figures$)$