Question

190 gram of cuso4 are placed in water. determine molality ​

Answer 1

Answer:

1.217

Explanation:

Molality is a way to express concentration of a solution in terms of number of moles of solute present per Kg of the solvent. Mathematically

Molality = Number of moles of solute/Mass of solvent in Kg

Given, mass of CuSO₄ = 190 gram

Molar mass of CuSO₄ = 156 gram

Number of moles of CuSO₄ = Given mass/molar mass

                                             =  190/156

                                             = 1.217 moles

Let us suppose we take 1 kg of water

Then, Molality = Number of moles/mass of solvent

                        = 1.217/1

                        = 1.217