# What weight (in grams) of KCl is there in 2.50 liters of 0.50M KCl solution?

$\text{Mass of solute}$ $=$ $\text{Concentration"xx"volume"xx"molar mass of solute}$ $\cong$ $90 \cdot g$
$\text{Moles of solute}$ $=$ $2.50 \cdot L \times 0.50 \cdot m o l \cdot {L}^{-} 1$ $=$ $1.25 \cdot m o l$.
$\text{Mass of solute}$ $=$ $1.25 \cdot m o l \times 74.55 \cdot g \cdot m o {l}^{-} 1$ $=$ ??g