Q26 · 2022 · Paper 1Unclassified4 marks
QUESTION 26 (4 marks)
Three unknown 0.1 M solutions, A, B and C, are found to have the following properties.
Solution | [H+] (mol L-1) | pH | pOH |
A | 0.0001 | 10.0 | |
B | 2.0 | ||
C | 0.063 |
a) Determine the pH of solution A.
[1 mark]
b) Determine the concentration of hydrogen ions [H+] in solution B.
[1 mark]
c) Calculate the pOH of solution C. Show your working.
[2 marks]
WORKED SOLUTION
4 marksQCAA guide · typeset solution
QCAA sample response and mark allocation
26a) | • determines pH for solution A is 4.0 [1 mark] | |
26b) | • determines [H+] for solution B is 0.01 [1 mark] | |
26c) |
QCAA sample response and marking criteria reproduced from the official guide.
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