Question

What is meant by concentration of a solution? Calculate the mass of glucose and water
required to prepare 250 g of 15% glucose solution.

Answer 1

Answer:

Percentage of solution= 5

Mass of solution= 250g

% of solution= Mass of solution mass of solute×100

∴ Mass of solute= 1005×250=12.5g

Answer 2

A solution is a homogenous (fine) mixture of a substance (called solute) dissolved in another substance (called solvent). The amount of solute dissolved in a particular amount of the solvent is a crucial parameter and is called the concentration of the solution.

Given:-

Mass percentage = 25%

Mass of solvent = 250 g

To Find:-

Mass of water

Mass of glucose

Solution:-

We know that,  

Mass percentage = mass of solute / mass of solvent x 100

Here,

Mass % = 25

Mass of solvent = 250 g

25 % = Mass of solute/ 250 x 100

Mass of solute = 15 x 250/100

                          = 3750/100

                          = 37.5 g

------------------------

Mass of water = Mass of solution - Mass of solute

                        = 250 - 37.5

                       = 212.5 g

∴ The mass of glucose is 37.5g and mass of water is 212.5g.