Question

Which of the following has highest boiling point
a)1M glucose
b)1M KCl
c)1M Al(NO3)3
d)1M Na2SO4

Answer 1

⭐⭐⭐ Hey mate!!⭐⭐⭐

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Al(NO3)3 >> Al3+ + 3 NO3-

When Al(NO3)3 dissolves we get 4 ions so the Van'Hoff factor is 4...

As we know...

More the value of vent'Hoff factor... More will be boiling point...

Hence,

Correct answer is option (c)

Hope it will help you...

#phoenix

Answer 2

$Al(NO_3)_3$ has the highest boiling point

Explanation:

The expression of elevation in boiling point is given as:

$\Delta T_b=i\times k_b\times m$

where,

$\Delta T_b$ = Elevation in boiling point

i = Van't Hoff factor  

$T_b$ = change in boiling point

$k_b$ = boiling point constant

m = molality

For the given options:

Option 1:  1 m glucose

Value of i = 1  (for non-electrolytes)

So, molal concentration will be = $1\times 1=1m$

Option 2:  1 m KCl

Value of i = 2

So, molal concentration will be = $1\times 2=2m$

Option 3:  1 m $Al(NO_3)_3$

Value of i = 4

So, molal concentration will be = $1\times 4=4m$

Option 4:  1 m $Na_2SO_4$

Value of i = 3

So, molal concentration will be = $1\times 3=3m$

As, the molal concentration of $Al(NO_3)_3$ is the highest, so its boiling point will be the highest.

Learn more about boiling points:

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