What is the concentration of solution a solution contains 40gm of sugar in 320gm of water calculate the concentration of solution?

14. 2 %
12.5 %
10.5 %
11. 1 %

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Concept:

Solution

A solution is a homogenous mixture.
The substance dissolved is called Solute and the substance which in solute is dissolved is called the solvent.
In the common saltwater solution, common salt is solute, water is solvent.

Mass by Mass Percentage

The mass by the mass percentage of a solution is calculated as

\(P = \frac{Mass \ of \ Solute}{Mass \ of \ solution} \times 100 \%\)

Calculation:

Mass of Solute ma = 40 gm

Mass of Solven water mb = 320 gm

Mass of solution = ma + mb = 40 gm + 320 gm = 360 gm

\(P = \frac{m_a}{m_a + m_b} \times 100 \%\)

Required percentage

\(P = \frac{40}{320 + 40} \times 100 \%\)

\(\implies P = \frac{40}{360} \times 100 \%\)

⇒ P = 11.1 %

So the correct option is 11. 1 %

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CBSE 9 - Chemistry

Asked by amitgade248 | 26 Sep, 2019, 07:21: PM

ANSWERED BY EXPERT

Text Solution

Solution : Mass of solute (salt)=40 g Mass of solvent (water)=320 g We know, Mass of solution =Mass of solute +Mass of solvent `=40g +320g` =360 g Mass percentage of solution `=("Mass of solute ")/("Mass of solution ")xx100` `(40)/(360)xx100=11.1%`

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