- 14. 2 %
- 12.5 %
- 10.5 %
- 11. 1 %
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10 Questions 10 Marks 10 Mins
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
Text Solution
Solution : Mass of solute (salt)=40 g <br> Mass of solvent (water)=320 g <br> We know, <br> Mass of solution =Mass of solute +Mass of solvent <br> `=40g +320g` <br> =360 g <br> Mass percentage of solution <br> `=("Mass of solute ")/("Mass of solution ")xx100` <br> `(40)/(360)xx100=11.1%`
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