A 0.5215 -g sample of \(\mathrm{CaCO}_{3}\) is dissolved in \(12 \mathrm{M}\) HCl
and the resulting solution is diluted to \(250.0 \mathrm{mL}\) in a volumetric
flask.
a. How many moles of \(\mathrm{CaCO}_{3}\) are used (formula mass \(=100.1\) )
________ moles
b. What is the molarity of the \(\mathrm{Ca}^{2+}\) in the \(250 \mathrm{mL}\) of
solution? _______ \(M\)
c. How many moles of \(\mathrm{Ca}^{2+}\) are in a 25.0 -mL aliquot of the
solution in \(1 \mathrm{b} ?\) ______ moles
