## General, Organic, and Biological Chemistry: Structures of Life (5th Edition)

a. $2.5 \space g \space KCl$ b. $50. \space g \space NH_4Cl$ c. $25.0 \space mL \space acetic \space acid$
a. $5.0\%$ (m/m) KCl solution: $$5.0 \space g \space KCl = 100 \space g \space solution$$ $$50. \space g \space solution \times \frac{5.0 \space g \space KCl}{100 \space g \space solution} = 2.5 \space g \space KCl$$ b. $4.0\%$ (m/v) $NH_4Cl$ solution : $$4.0 \space g \space NH_4Cl = 100 \space mL \space solution$$ $$1250 \space mL \space solution \times \frac{4.0 \space g \space NH_4Cl}{100 \space mL \space solution} = 50. \space g \space NH_4Cl$$ c. $10.0\%$ (v/v) $acetic \space acid$ solution : $$10.0 \space mL \space acetic \space acid = 100 \space mL \space solution$$ $$250. \space mL \space solution \times \frac{10.0 \space mL \space acetic \space acid}{100 \space mL \space solution} = 25.0 \space mL \space acetic \space acid$$