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A 0.6% solution of urea (molecular weight = 60) would be isotonic with
- a)0.1 M glucose
- b)0.1 M KCl
- c)0.6% glucose solution
- d)0.6% KCl solution
Correct answer is option 'A'. Can you explain this answer?
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A 0.6% solution of urea (molecular weight = 60) would be isotonic with...
To determine which solution is isotonic with a 0.6% solution of urea, we need to compare the osmotic pressure of each solution. Osmotic pressure is determined by the concentration of solute particles in a solution.
Urea is a non-ionic solute, so it does not dissociate into ions when it dissolves in water. Therefore, the concentration of urea is equal to the number of urea molecules in the solution.
Let's compare the osmotic pressure of a 0.6% urea solution with each of the options:
a) 0.1 M glucose:
- The molecular weight of glucose is 180.
- 0.1 M glucose means 0.1 moles of glucose per liter of solution.
- Therefore, the concentration of glucose is 0.1 * 180 = 18 g/L.
- Since the molecular weight of urea is 60, a 0.6% urea solution means 0.6 g of urea per 100 mL of solution.
- To convert this to g/L, we multiply by 10 (since there are 10 100 mL in a liter), so the concentration of urea is 0.6 * 10 = 6 g/L.
- Since the concentration of urea is higher than the concentration of glucose, the osmotic pressure of the urea solution is higher.
- Therefore, a 0.6% urea solution is hypertonic compared to a 0.1 M glucose solution.
b) 0.1 M KCl:
- The molecular weight of KCl is 74.5.
- 0.1 M KCl means 0.1 moles of KCl per liter of solution.
- Therefore, the concentration of KCl is 0.1 * 74.5 = 7.45 g/L.
- The concentration of urea is still 6 g/L.
- Since the concentration of urea is lower than the concentration of KCl, the osmotic pressure of the urea solution is lower.
- Therefore, a 0.6% urea solution is hypotonic compared to a 0.1 M KCl solution.
c) 0.6% glucose solution:
- The concentration of glucose in a 0.6% glucose solution is 0.6 g/100 mL = 0.6 g/L.
- Since the concentration of urea is also 6 g/L, the osmotic pressure of the urea solution is the same as that of the glucose solution.
- Therefore, a 0.6% urea solution is isotonic with a 0.6% glucose solution.
d) 0.6% KCl solution:
- The concentration of KCl in a 0.6% KCl solution is 0.6 g/100 mL = 0.6 g/L.
- Since the concentration of urea is 6 g/L, the osmotic pressure of the urea solution is higher than that of the KCl solution.
- Therefore, a 0.6% urea solution is hypertonic compared to a 0.6% KCl solution.
In conclusion, the only solution that is isotonic with a 0.6% urea solution is a 0.6% glucose solution, so the correct answer is option 'A
Urea is a non-ionic solute, so it does not dissociate into ions when it dissolves in water. Therefore, the concentration of urea is equal to the number of urea molecules in the solution.
Let's compare the osmotic pressure of a 0.6% urea solution with each of the options:
a) 0.1 M glucose:
- The molecular weight of glucose is 180.
- 0.1 M glucose means 0.1 moles of glucose per liter of solution.
- Therefore, the concentration of glucose is 0.1 * 180 = 18 g/L.
- Since the molecular weight of urea is 60, a 0.6% urea solution means 0.6 g of urea per 100 mL of solution.
- To convert this to g/L, we multiply by 10 (since there are 10 100 mL in a liter), so the concentration of urea is 0.6 * 10 = 6 g/L.
- Since the concentration of urea is higher than the concentration of glucose, the osmotic pressure of the urea solution is higher.
- Therefore, a 0.6% urea solution is hypertonic compared to a 0.1 M glucose solution.
b) 0.1 M KCl:
- The molecular weight of KCl is 74.5.
- 0.1 M KCl means 0.1 moles of KCl per liter of solution.
- Therefore, the concentration of KCl is 0.1 * 74.5 = 7.45 g/L.
- The concentration of urea is still 6 g/L.
- Since the concentration of urea is lower than the concentration of KCl, the osmotic pressure of the urea solution is lower.
- Therefore, a 0.6% urea solution is hypotonic compared to a 0.1 M KCl solution.
c) 0.6% glucose solution:
- The concentration of glucose in a 0.6% glucose solution is 0.6 g/100 mL = 0.6 g/L.
- Since the concentration of urea is also 6 g/L, the osmotic pressure of the urea solution is the same as that of the glucose solution.
- Therefore, a 0.6% urea solution is isotonic with a 0.6% glucose solution.
d) 0.6% KCl solution:
- The concentration of KCl in a 0.6% KCl solution is 0.6 g/100 mL = 0.6 g/L.
- Since the concentration of urea is 6 g/L, the osmotic pressure of the urea solution is higher than that of the KCl solution.
- Therefore, a 0.6% urea solution is hypertonic compared to a 0.6% KCl solution.
In conclusion, the only solution that is isotonic with a 0.6% urea solution is a 0.6% glucose solution, so the correct answer is option 'A
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A 0.6% solution of urea (molecular weight = 60) would be isotonic with...
.6% Solution of urea F. Wt=60 isotopic solutionUrea of I =1 =@ So glucose of @ =1 and so
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A 0.6% solution of urea (molecular weight = 60) would be isotonic witha)0.1 M glucoseb)0.1 M KClc)0.6% glucose solutiond)0.6% KCl solutionCorrect answer is option 'A'. Can you explain this answer?
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