Question

3.5 litre of `0.01 M NaCl` is mixed with 1.5 litre of `0.05 M NaCl`. What is the concentration of the final solution?

Answer 1

`M_(1) V_(1) + M_(2) V_(2) = M_(3) V_(3)`
`0.01 xx 3.5 xx 0.05 xx 1.5 = M_(3) xx 5`
`(V_(3) = V_(1) + V_(2) = 3.5 + 1.5 = 5)`
`M_(3) = 0.022`