Question

how many gram of sucrose must be added to 375gram of water to prepare a 2.75% by mass solution of sucrose​
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Answer 1

Solution :

⏭ Given:

• mass of water = 375g
• %w/w of solution = 2.75%

⏭ To Find:

• Mass of sucrose

⏭ Formula:

✏ Formula of %w/w of a solution is given by...

$\bigstar \: \boxed{ \sf{ \red{\% \frac{w}{w} = \dfrac{mass \: of \: solute}{mass \: of \: solute + mass \: of \: solvent} \times 100}}}$

⏭ Calculation:

$\circ \sf \: \: \% \dfrac{w}{w} = \dfrac{w _ {sucrose}}{w _ {sucrose} + w _ {water}} \times 100 \\ \\ \circ \sf \: \frac{2.75}{100} = \frac{w _{sucrose}}{w_ {sucrose} + 375} \\ \\ \circ \sf \: \: 2.75(w _{ sucrose}) + 1031.25 = 100(w _ {sucrose}) \\ \\ \circ \sf \: 97.25(w _ {sucrose}) = 1031.25 \\ \\ \circ \sf \: \: w _ {sucrose} = \frac{1031.25}{97.25} \\ \\ \circ \: \boxed{ \sf{ \purple{w _{sucrose} = 10.6 \: g}}} \: \orange{ \bigstar}$

Answer 2

Answer:

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