Question

Which one of the following is a 1 molar solution?

Answer 1

We know the definiton of concentration which is `C=n/V`
`V` in `Litres`

Explanation:

Let's calculate the consentration of each solution
A)
`n_"KCl"=m/(Mr)=(74.6)/(74.6)=1mol`

`C=n/V=1/(0.1)=10M`

B)
`n_"NaOH"=m/(Mr)=10/40=0.25mol`

`C=n/V=0.25/0.25=1M`

So the correct solution is the B)