Answer
0.763 M KCl solution.
Work Step by Step
- Calculate or find the molar mass for $ KCl $:
$ KCl $ : ( 35.45 $\times$ 1 )+ ( 39.10 $\times$ 1 )= 74.55 g/mol
- Using the molar mass as a conversion factor, find the amount in moles:
$$ 15.6 \space g \times \frac{1 \space mole}{ 74.55 \space g} = 0.209 \space mole$$
$1 \space L = 1000 \space mL$
$$Volume(L) = 274 \space mL \times \frac{1 \space L}{1000 \space mL} = 0.274 \space L$$
- Write the molarity expression and evaluate it:
$$Molarity(M) = \frac{moles \space of \space solute}{liters \space of \space solution}$$
$$= \frac{0.209 \space mole \space KCl}{ 0.274 \space L \space solution} = 0.763 \space M \space KCl \space solution$$
