Question

what mass of sodium hydroxide must be dissolved in 500 ml of solution so that strength of the solution may be 10 gram per litre​

Answer 1

Answer ⇒ 5 grams NaOH.

Explanation ⇒ Volume of the solution = 500 mL = 0.5 L.

Using the formula,

Strength = mass/Volume.

∴ mass = Strength × Volume.

∴ mass = 10 × 0.5

∴ mass = 5 grams.

Hence, the mass of the solution is 5 grams.

Hope it helps.

Answer 2

given the solution = 10g/l

volume = 500 ml = 500/1000= 0.5 L

strength = mass of solute / mass of solution

mass of solute = strength * volume

= 10* 0.5 g

= 5 grams

the mass of solute = 5g