Question

How many grams of glucose ( CHO ) are needed to prepare 400ml of a 5 % glucose solution ?

Answer 1

Answer:

there are 20   grams of gloucose

Explanation:

Answer 2

Given: The compound glucose is used to prepare 400 mL of a 5% glucose solution

To find: Grams of glucose needed

Explanation: Let grams of glucose required be m.

5% glucose solution means that there should be 5 grams of glucose per 100 mL of the solution.

Here, volume of water given is 400 mL.

For preparing this solution in 100 mL, 5 grams of glucose would have been sufficient. But, since the volume given is 400 mL which is 4 times the volume the mass required will also be 4 times of 5 grams.

Mass of glucose required= 5*4 = 20 grams

Therefore, 20 grams of glucose is required for preparing 400 mL of 5% solution.