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Which is the ...

Question

Which is the correct formula for calculation weight percentage of a solution?

$\frac{Mass of solvent}{Mass of solute} \times 100$

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$\frac{Mass of solute}{Mass of solution} \times 100$

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$\frac{Mass of solvent}{Mass of solution} \times 100$

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$\frac{Mass of solution}{Mass of solute} \times 100$

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Solution

The correct option is B
$\frac{Mass of solute}{Mass of solution} \times 100$

The weight percentage of a formula is given by: $\frac{Mass of solute dissolved}{Mass of solution} \times 100$ %.

Here, Mass of solution = mass of solute + mass of solvent. It is expressed as a percentage.

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What is the correct formula for solubility of a solute in a solvent at any given temperature t⁰C?

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Which among the following formulae can be used for calculating the concentration?

(i) $\frac{mass of solute}{mass of solution} \times 100$

(ii) $\frac{mass of solute}{mass of solute + solvent} \times 100$

(iii) $\frac{mass of solvent}{mass of solution} \times 100$

(iv) $\frac{mass of solvent}{mass of solute + solvent} \times 100$

(v) $\frac{mass of solute}{volume of solution} \times 100$

(vi) $\frac{mass of solvent}{volume of solution} \times 100$

Which among the following formulae can be used for calculating the concentration?

(i) $\frac{mass of solute}{mass of solution} \times 100$

(ii) $\frac{mass of solute}{mass of solute + solvent} \times 100$

(iii) $\frac{mass of solvent}{mass of solution} \times 100$

(iv) $\frac{mass of solvent}{mass of solute + solvent} \times 100$

(v) $\frac{mass of solute}{volume of solution} \times 100$

(vi) $\frac{mass of solvent}{volume of solution} \times 100$

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