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elena-14-01-66 [18.8K]
3 years ago
5

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been? A

. 7 B. 5 C. 3 D. 9
Chemistry
2 answers:
lesya [120]3 years ago
8 0
Basic solution is pH>7
therefore the answer is D.9
babymother [125]3 years ago
6 0

Answer:

it is d. 9

Explanation:

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the vapor pressure of a naqueous solution is found to be 24.9 mmgh at 25C. what is the mole fraction of solute in this solution?
Gekata [30.6K]

Answer:

Mole fraction of solute is 0.0462

Explanation:

To solve this we use the colligative property of lowering vapor pressure.

First of all, we search for vapor pressure of pure water at 25°C  = 23.8 Torr

Now, we convert the Torr to mmHg. Ratio is 1:1, so 23.8 Torr is 23.8 mmHg.

Formula for lowering vapor pressure is:

ΔP = P° . Xm

Where ΔP = P' (Vapor pressure of solution) - P° (Vapor pressure of pure solvent)

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Explanation:

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