On mixing 15 ml of ethyl alcohol density 0.792 g/ml with 15 ml of pure water at 4°c, the resulting solution is found to have a density 0.924g/ml.The % contraction in volume is:-
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Answered by
207
Given:
- On mixing 15 ml of ethyl alcohol density 0.792 g/ml with 15 ml of pure water at 4°c, the resulting solution is found to have a density 0.924g/ml.
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To find:
- The % contraction in volume.
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Solution:
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We know that,
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Therefore,
→ Mass of alcohol = 15 × 0.792
→ Mass of alcohol = 11.88 g
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Similarly,
→ Mass of water = 15 × 1
→ Mass of water = 15 g
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Now,
→ Total mass = 11.88 + 15
→ Total mass = 26.88 g
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Using Formula
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Now,
- Expected volume = (15 + 15)mL
- Expected volume = 30 mL
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Finding the difference
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→ Difference = (30 - 29.0909) mL
→ Difference = 0.909 mL
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As we know that,
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- Substituting values
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Hence,
- % concentration in volume is 3.03%.
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Answered by
11
Given :-
On mixing 15 ml of ethyl alcohol density 0.792 g/ml with 15 ml of pure water at 4°c, the resulting solution is found to have a density 0.924g/ml.The % contraction in volume is:-
Solution :-
As we know that,
Mass = Volume × Density
- Mass of alcohol = 15 × 0.792
- Mass of alcohol = 11.88 g
⠀
Similarly,
- Mass of water = 15 × 1
- Mass of water = 15 g
⠀
Now,
- Total mass = 11.88 + 15
- Total mass = 26.88 g
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