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Arturiano [62]
3 years ago
5

A solution with a pH of 6 has a ______ difference in H ion concentration than a solution with pH of 10.

Chemistry
1 answer:
sergij07 [2.7K]3 years ago
4 0

Answer:

9.999x10^-7M

Explanation:

First, let us calculate the concentration of the hydrogen ion in both cases:

For pH 6:

pH = —Log [H+]

6 = —Log [H+]

—6 = Log [H+]

Take the anti-log of —6

[H+] = 1x10^-6M

For pH 10:

pH = —Log [H+]

10 = —Log [H+]

—10 = Log [H+]

Take the anti-log of —10

[H+] = 1x10^-10M

The difference between the [H+] of pH 6 and [H+] of pH 10 is given by:

1x10^-6 — 1x10^-10 = 9.999x10^-7M

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Answer: 1.61 x 10⁴ kPa

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To calculate the total number of moles of the mixture and thus determine the molar fraction of helium, we consider 100 g and calculate the number of moles that represent 10 g of O₂ (n₁), 50 g of He (n₂) and 40 g of N₂ (n₃):

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x₂ =  \frac{6.246 mol}{7.987 mol} = 0.78

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