Question

An analysis showed there is 0.010 mol KOH in a 10. kg sample of water. What is the concentration of KOH in ppm?

___ppm

Answer 1

Moles of KOH=0.01mol

• Mass of KOH=0.001(56.1)=0.561g

Concentration of KOH:-

`\\ \rm\Rrightarrow 0.561/10=0.561nm`

`\\ \rm\Rrightarrow 56.1ppm`

Answer 2

56.1 ppm

Step-by-step explanation:

Molar mass of KOH is 56.1g

Mass of 0.01 mole of KOH = 0.561g

Mass of water = 10kg = 10000g

Concentration of KOH in ppm = 0.561 / 10000 * 1000000

= 56.1 ppm