Question

How many milliliters of 4.24 M KCl must be diluted to make 825 milliliters of a 0.705 M KCl solution?

Answer 1

137.18mL

Explanations:

To get the required volume, we will use the dilution formula expressed as:

`C_1V_1=C_2V_2_{}`

C1 and C2 are the concentration of the solution

V1 and V2 are the corresponding volumes

Given the following parameters:

`\begin{gathered} C_1=4.24M \\ C_2=0.705M \\ V_2=825mL \\ V_1=\text{?} \end{gathered}`

Substitute the given parameters into the formula:

`\begin{gathered} V_1=(C_2V_2)/(C_1) \\ V_1=\frac{0.705\cancel{M}*825mL}{4.24\cancel{M}} \\ V_1=(581.625mL)/(4.24) \\ V_1=137.18mL \end{gathered}`

Hence the required volume of KCL that must be diluted to make 825 milliliters of a 0.705 M KCl solution is 137.18mL