Question

A teacher needs to prepare 4.5 L of 1.0 mol/L ehtanoic acid for an investigation. What volume of concentrated 17.4 mol/L ethanoic acid is required?Select one:a.65 mLb.260 mLc.130 mLd.520 mL

Answer 1

ANSWER

The initial volume of the acid is 260mL

EXPLANATION

Given that;

The final volume of the ethanoic acid is 4.5L

The final concentration of the ethanoic acid is 1.0 mol/L

The initial concentration of the ethanoic acid is 17.4 mol/L

Follow the steps below to find the volume of the ethanoic acid

Step 1; Apply the dilution formula

$\text{ C1 V1 = C2V2}$

Step 2; Substitute the given data into the formula

$\begin{gathered} \text{ 17.4 }\times\text{ V1 = 4.5 }\times\text{ 1.0} \\ \text{ 17.4 V1 = 4.5} \\ \text{ Divide both sides by 17.4} \\ \text{ V1 = }\frac{\text{ 4.5}}{\text{ 17.4}} \\ \text{ V1 = 0.260L} \\ \text{ V1 = 260mL} \end{gathered}$

Therefore, the initial volume of the acid is 260mL