Question

4. Find the boiling point of solution if 5.85g NaCl is dissolved in 500ml water (Kb of water = 0.512 K kg/mole)​

Answer 1

Answer:

is at faces 4. Find the boiling point of solution if 5.85g NaCl is dissolved in 500ml water (Kb of water = 0.512 K kg/mole)

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Answer 2

Given:

5.85g NaCl is dissolved in 500ml water

(Kb of water = 0.512 K kg/mole)​

Find boiling point = ?

First find the molarity

$\text { Molarity }=\frac{\text { W eight }}{\text { M. wt }} \times \frac{1000}{\mathrm{~V}(\mathrm{ml})}$

$=\frac{5.85}{58.5} \times \frac{1000}{500}$

Molarity = 0.2 M

Now find boiling point of solution

$\Delta \mathrm{T}=\mathrm{mK}_{\mathrm{b}}$

ΔT = 0.5 × 0.512

ΔT = 0.256 C°

Hence the boiling point of solution is 0.256 C°