Stoichiometry

K_{2} CO_{3} (a q) + CaCl_{2} (a q) \to 2 KCl (a q) + CaCO_{3} (s)

A student conducts an experiment to determine the molarity of a

K_{2} CO_{3} (a q)

solution of unknown concentration. The student mixes

100. mL

of the solution with excess

CaCl_{2} (a q)

, causing

CaCO_{3} (s)

to precipitate. The student then filters and dries the precipitate and records the data in the table below. (The molar mass of

CaCO_{3}

100. g/mol

Mass of filter paper	$0.70 g$ ‍
Mass of filter paper + $CaCO_{3}$ ‍ precipitate	$1.95 g$ ‍

What is the molarity of the $K_{2} CO_{3} (a q)$ ‍ solution?

Related content

Chemistry library