Single Choice

At same temperature which pair of the following solutions are isotonic?

A$$0.2M$$ $$BaCl_2$$ and $$0.2M$$ urea
B$$0.1M$$ urea and $$0.1M$$ NaCl
C$$0.1M$$ NaCl and $$0.1M$$ $$K_2SO_4$$
D$$0.1M$$ $$Ba(NO_3)_2$$ and $$0.1M$$ $$Na_2SO_4$$
Correct Answer

Solution

Isotonic solutions have the same osmotic pressure and same molar concentration.

The solution of $$0.1M$$ $$Ba(NO_3)_2$$ and $$0.1M$$ $$Na_2SO_4$$ are isotonic.

The osmotic pressure of $$0.1M$$ $$Ba(NO_3)_2$$

$$=iMRT=3\times 0.1RT=0.3RT$$

Osmotic pressure of $$0.1$$M $$Na_2SO_4$$

$$=iMRT=3\times 0.1RT=0.3RT$$

The correct answer is "The solution of $$0.1M$$ $$Ba(NO_3)_2$$ and $$0.1M$$ $$Na_2SO_4$$ are isotonic".

SIMILAR QUESTIONS

Solutions

In which case van't Hoff factor is maximum (assuming no hydrolysis)?

Solutions

The value of van't Hoff factors for $$KCl, NaCl$$ and $${K}_{2}{SO}_{4}$$, respectively, are :

Solutions

If $$\alpha$$ is the degree of dissociation of $${Na}_{2}{SO}_{4}$$, the vant Hoff's factor ($$i$$) used for calculating the molecular mass is:

Solutions

Which of the following salt has the same value of Van't Hoff factor i as that of $$K_3 [Fe(CN)_6]$$?

Solutions

The Van't Hoff factor, i for a $$0.2$$ molal aqueous solutions of urea is:

Solutions

The Van't Hoff factor for sodium phosphate would be:

Solutions

A $$1.2$$% of solution of $$NaCl$$ is isotonic with $$7.2$$% of solution of glucose. Calculate the van't Hoff's factor of $$NaCl$$ solution.

Solutions

The freezing point of a solution containing 5.85 g of $$NaCl$$ in 100g of water is $$-3.348^o$$C. Calculate van't Hoff factor 'i' for this solution. What will be the experimental molecular weight of NaCI? ($$K_f$$ for water = $$1.86 K kg mol^{-1}$$, at. wt. Na = 23, Cl = 35.5)

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