Problem: Find the pH of each mixture of acids.0.110 M in formic acid and 5.5×10−2 M in hypochlorous acid

FREE Expert Solution

We’re being asked to calculate the pH of a mixture of a 0.110 M formic acid and 5.5x10-2 M hypochlorous acid.


Recall that for a mixture of weak acids, the total [H3O+] can be calculated using the following equation:

[H3O+] = Ka1C1 + Ka2C2


where Ka1 is the acid dissociation constant of acid 1, C1 is the concentration of acid 1, Ka2 is the acid dissociation constant of acid 2 and C2 is the concentration of acid 2.


The relationship between H3O+ and pH is given by:

pH = - log [H3O+]


We will do the following steps to solve the problem:

Step 1: Calculate the total [H3O+] for the mixture

Step 2: Determine pH from [H3O+]


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Problem Details

Find the pH of each mixture of acids.

0.110 M in formic acid and 5.5×10−2 M in hypochlorous acid

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Weak Acids concept. If you need more Weak Acids practice, you can also practice Weak Acids practice problems.

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Based on our data, we think this problem is relevant for Professor Plath's class at UCB.