Salinity And Concentration Problems Conversion Worksheet (Page 2 of 3) in pdf

Salinity And Concentration Problems Conversion Worksheet Page 2

Page 2 of 3

21.2

Work through these example problems and check your answers. Then you will be ready to try the practice

problems on your own.

•

There are 16 grams of salt in 984 grams of water. What is the salinity of this solution?

Solution:

16 grams salt

salinity =

= 16 ppt

984 grams water + 16 grams salt

1,000 grams solution

•

A liter of solution has a salinity of 40 ppt. How many grams of salt are in the solution? How many grams of

pure water are in the solution?

Solution:

40 grams salt

40 ppt =

1,000 grams solution

40 grams salt + grams water

1, 000 grams solution = 40 grams salt + grams water

1,000 grams solution - 40 grams salt = 960 grams water

•

You measure the salinity of a seawater sample to be 34 ppt. How many grams of salt are in this sample if the

mass is 2 kilograms?

Solution: First, remember that there are 1,000 grams per kilogram. If a solution is given in parts per

thousand, you can think of it as “grams per 1,000 grams” or “grams per kilogram.” Therefore, you can set up

a proportion like this:

34 grams salt

grams salt

1 kilogram solution 2 kilograms solution

Next, solve for x .

34 grams salt

2 kilograms solution

1 kilogram solution

= 68 grams salt

Salinity And Concentration Problems Conversion Worksheet Page 2