Which diagram represents ionisation of a weak acid?
A - HSC - SSCE Chemistry - Question 10 - 2018 - Paper 1
Question 10
Which diagram represents ionisation of a weak acid?
A.
B.
C.
D.
Worked Solution & Example Answer:Which diagram represents ionisation of a weak acid?
A - HSC - SSCE Chemistry - Question 10 - 2018 - Paper 1
Step 1
Identify the concept of weak acid ionisation
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Ionisation of a weak acid involves the partial dissociation of the acid in water, resulting in a reversible reaction. This means not all acid molecules donate protons (H+), and an equilibrium is established between the undissociated and dissociated species.
Step 2
Analyze the diagrams for ionisation representation
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
In the diagrams, the presence of dissociated ions (H extsuperscript{+} and A extsuperscript{-}) should be observed. Weak acids will show a lesser number of dissociated ions compared to strong acids.
Step 3
Select the correct diagram
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Based on the analysis, diagram D is the correct representation, as it shows a balance between dissociated ions and unionised acid, consistent with the characteristics of a weak acid.
