Question

Part II Dilution Problems: 20. A bottle is labeled 12,0 M HCI. What volume of the original HCl is required to make 20.0 mL of 3.0 M HCl solution?

Answer 1

`5.0\text{ mL}`

Step-by-step explanation:

Here, we want to get the volume needed to make 20 mL of 3 M HCl

Mathematically, according to the dilution formula:

`C_1V_1\text{ = C}_2V_2`

Where C1, V1 are the initial molarity and volume respectively, while:

C2, V2 are the final molarity and volume respectively

Substituting the values, we have it that:

`\begin{gathered} 12\text{ }*\text{ V}_1\text{ = 20 }*\text{ 3} \\ V_1\text{ = }(20*3)/(12) \\ V_1\text{ = 5 mL} \end{gathered}`