A student was asked to test the pH's of the following solutions using a pH probe.
- Ethanoic acid
- Propanoic acid
- Hydrochloric acid
- Ammonia
- Sodium hydroxide
The pH probe should be calibrated before use.
Explain how two point calibration of the pH probe should take place.
Describe how the student could use universal indicator to test the pH values of the solutions.
Using the pH probe, the student records the pH of hydrochloric acid to be 1.04.
Calculate the concentration of the solution. Give your answer to two decimal places.
The student is then asked to make a buffer solution with the ethanoic acid solution.
State the name of a suitable compound which can be added to the ethanoic acid solution which would form a buffer solution.
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