Question

If I have 340 mL of a 0.5 M NaBr solution, what will the concentration be if I add 560 mL more water to it?

Answer 1

The correct answer is "0.31 M".

Step-by-step explanation:

Given,

Volume,

`V_1=340`

`V_2=560`

Molarity,

`M_1=0.5`

Let the M₂ be "x".

By using the dilution formula, we get

⇒
`M_1V_1=M_2V_2`

then,

⇒
`0.5* 340=x* 560`

⇒
`170=x* 560`

⇒
`x=(170)/(560)`

⇒
`=0.31 \ M`