Question

question 16 (1 point)
find the percent concentration (m/v) when 14.2 g of potassium chloride. kcl is dissolved in 450 ml of solution (assume that the volume remains the same when the solute is added).
3.16%
14.2%
450%
none of the above

Explanation:

Step1: Recall the formula for percent concentration (m/v)

Percent concentration (m/v) = $\frac{\text{mass of solute (g)}}{\text{volume of solution (mL)}}\times100\%$

Step2: Substitute the given values into the formula

Here, mass of solute ($\text{KCl}$) = $14.2$ g and volume of solution = $450$ mL.
Percent concentration (m/v) = $\frac{14.2}{450}\times100\%$

Step3: Calculate the value

$\frac{14.2}{450}\times100\%=\frac{1420}{450}\% \approx 3.16\%$

Answer:

A. $3.16\%$