Question

what will be the molality of solution made by dissolving 10g of NaOH in 100g of water?​

Answer 1

Answer:

Answer. Explanation: Molarity of a solution is defined as the number of moles of solutedissolved per Liter of the solution. Therefore, the molarity of solution will be 0.25 mole/L.

Answer 2

Given: A solution made by dissolving 10g of NaOH in 100 g of water

To find: Molality of the solution

Explanation: Molality of a solution is a way of measuring concentration of the solution. Its unit is m.

Molality= Moles of solute/ Mass of solvent in kg

Molar mass of NaOH= 40 g/mol

Mass of water= 100g = 0.1 kg

Now, Moles of NaOH= Given mass/ Molar mass

= 10/40

= 0.25 moles

Using formula of molality given:

Molality= 0.25/0.1

= 2.5 m

Therefore, the molality of solution made by dissolving 10 g NaOH in 100g water is 2.5 m.