Question

to what volume in ml should you dilute 100ml of a 2.50 m CaCl2 solucion to obtain 0.75 M CaCl2 solution

Answer 1

Answer: Volume = 333.33 ml.

Explanations :

GIVEN :

• Volume ,(V1)= 100ml

• Concentration ,(C1) = 2.50 M

• Concentration ,(C2) = 0.75 M

• Volume ,(V2) = ?

The relationship between Volume and Concentration can be represented by formula :

`C_{1\text{ }}V_1=C_2V_2`

Replacing the given parameters into the formula above , Final Volume (V2) will be :

`\begin{gathered} C_1V_1=C_2V_2 \\ \therefore V_{2\text{ }}=\text{ }(C_1\cdot V_1)/(C_2) \\ \text{ =}\frac{2.50\text{ M }\cdot100\text{ ml}}{0.75\text{ M }} \\ \text{ = }333.33\text{ ml} \end{gathered}`

This means thea final volume = 333.33ml