A 1 M solution of glucose is 180 g of glucose in a 1 liter s

A 1 M solution of glucose is 180 g of glucose in a 1 liter solution. If you wanted to make a solution of 0.2 M glucose, how many grams of glucose would you need?

Solution

Answer:

1 Molar solution (1M) contains 1 mole of solute dissolved in a solution totaling 1 liter. And one mole is the molecular weight (MW) expressed in grams. Thus, 1 M = 1 gMW of solute per liter of solution.

The gMW of glucose (C₆H₁₂O₆) is calculated as (72+12+96) 180g. The calculation is given below:

Thus, 1M aqueous solution of glucose contain 180 grams of glucose in totaling 1 liter of solution. Likewise, to prepare a 0.1M solution of glucose we have to dissolve 18 grams (180 g/10) of glucose in distilled water totaling 1 liter of solution. And to prepare a 0.2M solution of glucose we have to dissolve 36 g (18 X 2) of glucose in distilled water totaling 1 liter of solution.