the molar mass of kcl is 74.55 g/mol. if 8.45 g kcl are dissolved in 0.750 l of solution, what is the…

the molar mass of kcl is 74.55 g/mol. if 8.45 g kcl are dissolved in 0.750 l of solution, what is the molarity of the solution? use molarity = moles of solute / liters of solution. 0.113 m 0.151 m 6.62 m 11.3 m

the molar mass of kcl is 74.55 g/mol. if 8.45 g kcl are dissolved in 0.750 l of solution, what is the molarity of the solution? use molarity = moles of solute / liters of solution. 0.113 m 0.151 m 6.62 m 11.3 m

Answer

Explanation:

Step1: Calculate moles of KCl

$n=\frac{m}{M}$, where $m = 8.45\ g$ and $M=74.55\ g/mol$. So $n=\frac{8.45}{74.55}\ mol\approx0.1133\ mol$.

Step2: Calculate molarity

$Molarity=\frac{moles\ of\ solute}{liters\ of\ solution}$. Substitute $n = 0.1133\ mol$ and $V = 0.750\ L$. So $M=\frac{0.1133}{0.750}\ M\approx0.151\ M$.

Answer:

0.151 M