A Level Chemistry 2017 Paper 1 Question 6 Solution - Exclusive

In this exclusive video we want to discuss the suggested solution for A Levels Chemistry (H2 Chemistry) 2017 Paper 1 Question 6.

Let's take a look at this question.

Topic tested is on Ionic Equilibria and definitions of Bronsted-Lowry Acid and Base, and Lewis Acid and Base.

Bronsted-Lowry Theory of Acids and Bases is based on proton transfer:

A Bronsted acid is defined as a proton or H⁺ donor, while
A Bronsted base is a proton or H⁺ acceptor.

Lewis Theory of Acids and Bases is based on electron pair transfer:

A Lewis acid is an electron pair acceptor, while
A Lewis base is an electron pair donor.

So based on these definitions we can compare the options and see which of these species can function as both a Lewis base and Bronsted-Lowry acid.

Therefore B is the best answer as H₂O can donate lone pair to form H₃O⁺ (Lewis base) and it also also donate H⁺ to form OH^- (Bronsted acid).

Check out this video for the question and the suggested solution!

Topic: Ionic Equilibria, Physical Chemistry, A Level Chemistry, Singapore

Found this A Level Chemistry video useful?

Please LIKE this video and SHARE it with your friends!

Looking for H2 Chemistry Tuition? Do consider taking up my classes at Bishan or online classes!