Calculate the acid concentration of a sample of acid rain with a pH of 4.20.Group of answer choices4.2 × 10-1M7.7 × 10-9M6.3 × 10-5M0.62 M 1.0 × 10-4M
Question
Calculate the acid concentration of a sample of acid rain with a pH of 4.20.Group of answer choices4.2 × 10-1M7.7 × 10-9M6.3 × 10-5M0.62 M 1.0 × 10-4M
Solution
The pH of a solution is calculated using the formula:
pH = -log[H+]
where [H+] is the concentration of hydrogen ions in the solution.
To find the [H+] of a solution given the pH, you can rearrange the formula to:
[H+] = 10^-pH
So, for a solution with a pH of 4.20, the [H+] would be:
[H+] = 10^-4.20
This equals approximately 6.3 × 10^-5 M.
So, the acid concentration of a sample of acid rain with a pH of 4.20 is 6.3 × 10^-5 M.
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Rainwater was collected at thirty different sites near an industrial basin and the amount of acidity (pH level) was measured. The pH values were:2.6, 2.7, 2.9, 3.2, 3.3, 3.7, 3.7, 3.8, 3.9, 4.1, 4.2, 4.2, 4.2, 4.4, 4.4,4.6, 4.8, 4.9, 4.9, 5.0, 5.5, 5.5, 5.6, 5.7, 5.8, 5.8, 6.0, 6.2 6.3, 6.3The interquartile range is:
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