A \(0.3946 \mathrm{g}\) 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 \(\left.\mathrm{CaCO}_{3} \text { are used (formula mass
}=100.1\right) ?\)
______ moles
b.What is the molarity of the \(\mathrm{Ca}^{2+}\) in the \(250 \mathrm{mL}\) of
solution?
______\(\mathbf{M}\)
c. How many moles of \(\mathrm{Ca}^{2+}\) are in a 25.00-mL aliquot of the
solution in \(1 \mathrm{b} ?\)
______moles
