Question

calculate the mass of glucose and mass of water required to make 200 g of 25 % solution of glucose ​

Answer 1

Answer :-

• Mass of glucose = 10 g

• Mass of water = 150 g

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Explanation :-

Given :-

Mass percentage = 25%

Mass of solvent = 250 g

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To Find :-

• Mass of water

• Mass of glucose

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Solution :-

We know that,  

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

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Here,

Mass % = 25

Mass of solvent = 200 g

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25 % = Mass of solute/ 200 x 100

Mass of solute = 25 x 200/100

= 5000/100

= 50 g

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Mass of water = Mass of solution - Mass of solute

= 200 - 50

= 150 g

Answer 2

w/w% of concentration = 25%

Mass of Solution = 200 g

Let the mass of Solute be = (x) g

We know,

w/w% of concentration = (Mass of solute) ÷ (Mass of solution) × 100%

$\therefore$ x/200 × 100 = 25

$\longrightarrow$ x/2 = 25

$\longrightarrow$ x = 50 grams.

Or,

Mass of solvent = Mass of solution - Mass of solute

$\longrightarrow$ Mass of solvent = 200 g - 50 g = 150 g.