Question

three grams (3 g) of solution in 100 mL of solvent equals ____ % (w/v)

Answer 1

Answer

3%(w/v)

Explanation

Given:

mass of solute = 3 g

volume of the solvent = 100 mL

Solution:

We want to solve for concentration in w/v%

$\begin{gathered} Concentration\text{ = }\frac{mas\text{s of solute }}{volum\text{e of solvent}} \\ \\ Concentration\text{ = }\frac{3\text{ g}}{100\text{ mL}}\text{ } \\ \\ Concentration\text{ = 0.03 g.mL} \end{gathered}$

To get the %w/v. You need to multiply by 100

0.03 x 100 = 3%(w/v)