Question

To make a saturated solution 36g of sodium chloride is dissolved in 100g of water at 293k. find its concentration at this temperature...

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Answer 1

Answer:

(a) Mass of solute = 36 g.

Mass of solvent = 100g.

Mass of solution = 100 + 36.

= 136g.

Concentration of solution = (Mass of solute / Mass of solution ) x100.

= (36/136) x 100.

= 26.47%

(b) If temperature increases, solubility increases and if temperature decreases, solubility decreases.

Explanation:

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Answer 2

Answer:

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Mass per cent is a way of expressing a concentration or describing the component in a particular mixture. The solution composition can be expressed in mass percentage that depicts the mass of solute present in a given mass of solution.

The quantity of solute is expressed in mass or by moles. For a solution, the mass per cent is described as the grams of solute per grams of solution, multiplied by 100 to get the percentage.

Concentration

Mass of sodium chloride (Solute) = 36gm

Mass of water (solvent) = 100 gm

Mass of solution = 36+100

∴ Mass of solution = 136 gm

Concentration = (Mass of Solute / Mass of Solution) * 100

Concentration = (36/136) × 100

Concentration = 26.47%

Temperature

If temperature increases, solubility increases and if temperature decreases, solubility decreases.

It is possible to distinguish the particles of solute from those of solvent in a suspension, since particle size is bigger in suspensions, hence it is easier to distinguish the particles of solute.