Question

What is the concentration expressed in parts per million of a solution containing 15.0 grams of KNO3 in 65.0 grams of H2O?

Answer 1

The concentration will be "
`1.88* 10^5 \ ppm`".

Step-by-step explanation:

The given values are:

Mass of solute (KNO₃),

= 15.0 grams

Mass of solvent (H₂O),

= 65.0 grams

The concentration will be:

=
`(Mass \ of \ solute)/(Mass \ of \ solution)* 10^6`

On substituting the values, we get

=
`(15.0)/(65.0+15.0)* 10^6`

=
`(15.0)/(80)* 10^6`

=
`0.1875* 10^6`

=
`187500 \ ppm`

or,

=
`1.88* 10^5 \ ppm`