Question

A saturated solution of salt x contains 0.28g of the salt in 100cm³ of solution at 25 degrees Celsius what is the solubility of the salt x at this temperature (relative molecular mass of x = 56)

Answer 1

Solution:

The formula for the calculation of moles of solute can be expressed as:

Moles = Mass / Molar mass

Moles of salt = (0.28 g) / (56 g/mol) = 0.005 mol.

The number of moles of the salt is 0.005 mol.

The formula for the calculation of solubility of the salt can be expressed as:

Solubility = Moles / Volume of Solution

Solubility of salt = (0.005 mol) / (0.1 L) = 0.05 mol/L.

The solubility of the salt  is 0.05 mol/L.

Answer: The solubility of the salt is 0.05 mol/L.