Problem: Calculate the pH of the following solutions: Buffer 1: 25.0 mL of 0.20 M acetic acid with 35.0 mL of 0.10 M NaOH. Buffer 2: 50.0 mL of 0.18 M NH3 with 5.0 mL of 0.36 M HBr.

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FREE Expert Solution

Part A. We are being asked to determine the pH of the buffer of 25.0 mL of 0.20 M acetic acid with 35.0 mL of 0.10 M NaOH.


CH­3COOH (weak acid) will react with NaOH (strong base).


Reaction:

CH3COOH(aq) + NaOH(aq) CH3COO(aq) + H2O(l)

***Na+ is a neutral ion and has no contribution to pH


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Problem Details

Calculate the pH of the following solutions: 

Buffer 1: 25.0 mL of 0.20 M acetic acid with 35.0 mL of 0.10 M NaOH. 

Buffer 2: 50.0 mL of 0.18 M NH3 with 5.0 mL of 0.36 M HBr.

Frequently Asked Questions

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 Buffer concept. You can view video lessons to learn Buffer. Or if you need more Buffer practice, you can also practice Buffer practice problems.

What professor is this problem relevant for?

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