Answer:
10⁻⁴ M is the hydrogen ion concentration of the lake.
Explanation:
pH is defined as the negative logarithm of the concentration of hydrogen ions.
Thus,
pH = - log [H⁺]
pH scale generally runs from 1 to 14 where pH = 7 represents neutral medium, pH < 7 represents acidic medium and pH > 7 represents basic medium.
Given that, pH = 4.0
So,
4.0 = - log [H⁺]
OR,
[H⁺] = antilog (-4) = 10⁻⁴ M
10⁻⁴ M is the hydrogen ion concentration of the lake.
The hydrogen ion concentration, [H⁺] of the lake is 10¯⁴ M
The pH of a solution is a measure of the acidity and alkalinity of a solution. The pH of a solution can be obtained mathematically by:
pH = –Log [H⁺]
With the above formula, we can obtain the hydrogen ion concentration, [H⁺] of the solution.
From the question given above, we obtained:
pH = –Log [H⁺]
4 = –Log [H⁺]
Multiply through by –1
–4 = Log [H⁺]
Take the anti-log of –4
[H⁺] = Anti-log –4
[H⁺] = 10¯⁴ M
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