Question

A 0.885 M solution of KBr whose initial volume is 82.5 mL has more water added until its concentration is 0.500 M. What is the new volume of the solution?

Answer 1

`V_2=146mL`

Step-by-step explanation:

Hello there!

In this case, since the equation for the calculation of dilutions is:

`M_1V_1=M_2V_2`

Whereas M is the molarity and V the volume, because the final concentration is lower than the initial. Thus, since we are asked to calculate the final volume, we solve for V2 as follows:

`V_2=(M_1V_1)/(M_2)=(0.885M*82.5mL)/(0.500M)\\\\V_2=146mL`

Best regards!