In the previous posts, we have looked at the 1) strategy to determine a Bronsted-Lowry Acid-Base reaction, as well as 2) strategy to calculate the pH and degree of dissociation of a weak acid, and 3) strategy to calculate the pH of a salt. In case you have missed that, you should take a look at it as soon as possible. This is because buffers are based on Bronsted-Lowry Acid-Base Theory and it is important that you have strong foundations of the basic concepts before looking at buffers.
Buffers are defined as solutions with resist pH changes upon dilution or when a small amount of acids or bases are added to it.
There are essentially two types of buffers, namely:
A) Acidic Buffers: consists of a Weak Acid and its Conjugate Base
B) Alkaline/Basic Buffers: consists of a Weak Base and its Conjugate Acid
Assuming you are good with your basic concepts already, let’s take a look at a video which contains an excerpt of Mr Sean Chua’s A-Level JC2 H2 Chemistry Tuition Class teachings on “How to calculate the pH of an Acidic Buffer” using a challenging exam-based question.
Length of video: 4.43 mins
Direct video link: https://youtu.be/jEo4x6DRyCk
I hope you find the content easy for your understanding and if you have any questions, leave me a comment below. Feel free to share this blog post with your friends.
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PS: Under related articles below, there are several blog post discussions and questions related to Acid-Base Equilibrium. You can also do a keyword search using the search box at the top right hand corner. You will be able to find tips and notes on H2 Chemistry.
