What is the concentration (in m) of a 225ml potassium sulfate solution that contains 4.15g of potassium?

The concentration of solution in M or mol/L can be calculated using the following formula:

.... (1)

Here, n is number of moles and V is volume of solution in L.

The molecular formula of potassium sulfate is thus, there are 2 moles of potassium in 1 mol of potassium sulfate.

1 mol of potassium will be there in 0.5 mol of potassium sulfate.

Mass of potassium is 4.15 g, molar mass is 39.1 g/mol.

Number of moles can be calculated as follows:

Here, m is mass and M is molar mass

Putting the values,

Thus, number of moles of   will be .

The volume of solution is 225 mL, converting this into L,

Thus,

Putting the values in equation (1),

Therefore, concentration of potassium sulfate solution is 0.236 M.

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