A solution of 6 % ( mass/volume)solution of urea is isotonic with
a)1 M solution of urea
b)0.05 M solution of glucose
c)2 M solution of NaCl
d)0.5 M solution of sucrose
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A solution of 6 % ( mass/volume)solution of urea is isotonic with :
a) 1 M solution of urea
Given:
Mass by volume concentration of urea solution = 6 %
To Find:
The solution from the given options which is isotonic with the given solution.
Calculation:
- 6% w/v urea solution means 6 g of urea is dissolved in 100 ml water.
⇒ w = 6 gm and V = 100 ml
- So, the molarity of urea solution:
M = (w × 1000)/(M.wt × V)
⇒ M = (6 × 1000)/(60 × 100)
⇒ M = 1 M
- Isotonic solution means the solutions which have the same osmotic pressure.
- At the same temperature, osmotic pressure depends upon the concentration of the solute.
⇒ So, 1 M urea solution will be isotonic with the given 6% w/v urea solution.
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