Answer to Question #350884 in Chemistry for mica

Question #350884

Determine the pH of a 0.020 M HNO3 


1
Expert's answer
2022-06-16T05:56:04-0400

Solution:

Nitric acid (HNO3) is a strong acid because it dissociates almost completely.

Nitric acid dissociates as follows:

HNO3(aq) + H2O(l) → H3O+(aq) + NO3(aq)

This means that the concentration of hydronium ions (H3O+) will be equal to that of the nitric acid:

[H3O+] = [HNO3] = 0.020 M


We can convert between [H3O+] and pH using the following equation:

pH = −log[H3O+]

pH = −log(0.020) = 1.699 = 1.70

In this case, the pH of the solution will be 1.70


Answer: pH = 1.70

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