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For a solution to be isotonic 0.9%NaCl (Inside red blood cell), the osmolarity should be 0.308mol/L (same with RBC.) But, 0.3M Glucose has an osmolarity of 0.3mol/L, and is close to 0.9% NaCl's osmolarity...should 0.3M Glucose be considered isotonic or hypertonic?

2007-08-19 03:42:26 · 3 answers · asked by Jed Stephen 3 in Science & Mathematics Chemistry

3 answers

Medically it is usually isotonic glucose referred to as 5% Glucose solution.

5% is 50 grams of glucose per liter. The molecular mass of glucose is about 180 g/mol. this means 5% is usually about 0.278 moles/Liter.

Unlike salts, which can enter a cell and change the osmolarity, glucose is metabolized and usually does not change the osmolarity inside the cells.

2007-08-19 04:06:32 · answer #1 · answered by Richard 7 · 10 0

0.3M glucose is isotonic. as glucose is not an electrolyte osmolarity= molarity here 0.3. The difference 0.308-0.3 is very small and so glucoe at 54g/L is isotonic

2007-08-19 03:57:15 · answer #2 · answered by maussy 7 · 0 0

hypertonic, normal levels of glucose are 4-8 mmol/l

2007-08-19 04:00:31 · answer #3 · answered by Chris 5 · 0 0

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