A student does three titrations with dilute hydrochloric acid and potassium hydroxide solution.
Hydrochloric acid neutralises the alkali potassium hydroxide.
HCl (aq) + KOH(aq) → KCl (aq) + H2O(l)
Look at the apparatus she uses.
Look at the diagrams. They show parts of the burette during the first titration.
Here is the student’s results table.
Titration number | 1 | 2 | 3 |
Final reading (cm3) | 37.5 | 32.1 | |
Initial reading (cm3) | 20.4 | 15.0 | |
Titre (volume of acid added) (cm3) | 17.1 | 17.1 |
Explain your answer.
Answer = …………………………………. cm3
[2]
Higher Only
Higher Only
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