Question

5. What is the concentration of 0.039 g KCN in 100 ml solution in parts per million (ppm).

please show your work

Answer 1

ppm (parts per million ) is a term used in chemistry to show very low concentration.

One gram in one liter denotes 1000ppm solution

i.e. 0.001gm in 1000 ml represent 1ppm

Let's convert this solution first to grams /liter

We have 0.039 grams in 100 ml water

So 0.39 grams in 1000ml water

i.e. 0.39grams per liter

since 1g/l denotes 1000 ppm

So 0.39 grams/ liter= 390 ppm

so this solution has concentration of 390 ppm( parts per million)

​​​​​​I hope this helps if you have any query or want more detailed explanation feel free to ask in the comment section below.