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Andrew [12]
3 years ago
5

Why is a solution not a pure substance

Chemistry
2 answers:
posledela3 years ago
6 0
Because mixture of 2 substances does not make it pure....<span />
trasher [3.6K]3 years ago
3 0
Solution is not a pure substance b/c it is mixture of two substance
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A certain amount of hydrogen peroxide was dissolved in 100. mL of water and then titrated with 1.68 M KMnO4. What mass of H2O2 w
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Answer:

see explanation below

Explanation:

First to all, this is a redox reaction, and the reaction taking place is the following:

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According to this reaction, we can see that the mole ratio between the peroxide and the permangante is 5:2. Therefore, if the titration required 21.3 mL to reach the equivalence point, then, the moles would be:

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h would be the hydrogen peroxide, and p the permanganate.

But like it was stated before, the mole ratio is 5:2 so:

5MhVh = 2MpVp

Replacing moles:

5nh = 2MpVp

Now, we just have to replace the given data:

nh = 2MpVp/5

nh = 2 * 1.68 * 0.0213 / 5

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Now to get the mass, we just need the molecular mass of the peroxide:

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