Question

which of the following solution is hypotonic ? a)0.1M nacl B)0.1M sugar C) 0.1M Na2so4 D)0.1M Fecl3

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Answer 1

Answer:

Urea and glucose do not dissociate in solution. Sodium chloride gives two ions and potassium sulphate gives three ions per formula unit.

Therefore, the effective number of particles is maximum in potassium sulphate , and it shows the maximum depression in freezing point.( please mark me Brainlist)

Answer 2

The osmotic pressure of a solution is its colligative property and depends upon the number of particles present in the solution. The dissociation of 1 molecule of Na 2

SO4

gives 3 ions whereas dissociation of 1 molecule of NaCl gives 2 ions. However the molar concentration of 0.1MNa

2

SO4

and 0.1 M NaCl solutions is same. The total number of particles present in 0.1MNa2

SO4

solution is more than the total number of particles present in 0.1 M NaCl solution Hence, the osmotic pressure of 0.1MNa2

SO 4

more than the osmotic pressure of 0.1 M NaCl solutions.

However, 0.1 N Na2

SO4

solution corresponds to 0.05 M Na2

SO4

whereas 0.1 N NaCl solution corresponds to 0.1 M NaCl solution. Hence, the osmotic pressure of 0.1 N Na2

SO l4

is less than the osmotic pressure of 0.1 N NaCl.