Question

How many grams of sodium chloride (Nacl) is present in 350 g of saturated solution if solubility of sodium chloride is 25.8 at 25°C?

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Answer 1

Answer:

Correct option is

B

180g

weight of salt = 90 gram,

solubility = 50

sing formula

solubility of solute =

weightofsolventinsaturatedsolution

weightofsoluteinsaturatedsolution

×100

or 50=

weightofsolventinsaturatedsolutio

90gm

×100

so weight of solvent in saturated solution =

50

90gm

×100=180gm

Hence 180 gm of water is required to prepare a saturated solution.

Answer 2

Answer:

71.78 g

Explanation:

Solubility = (Mass of Solute/Mass Of Solvent) x 100

$25.8 = \frac{100x}{350-x}$

$0.258 = \frac{x}{350-x}$

On solving, we get $x = 71.78 g$

So 71.78 g of sodium chloride is present in the saturated solution.

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