AQA A Level Chemistry - Paper 3
Experiments QUESTIONS AND VERIFED
CRRECT ANSWERS GRADED A+
LATEST 2026-2027 100% GUARANTEED
PASS
Make Up a Volumetric Solution - CORRECT ANSWER-1. Weigh dry weighing boat
2. Place mass of solid into the boat and weigh accurately
3. Pour solid into a beaker. Reweigh empty weighing boat and calculate how much was
transferred
4. Add deionised water and stir with glass rod until dissolved
5. Funnel into a volumetric flask
6. Make up to mark with deionised water until bottom of meniscus is on the mark
7. Stopper and invert to mix
Acid-Base Titration - CORRECT ANSWER-1. Fill a burette
2. Use a pipette to transfer 25cm³ of the other solution into the conical flask
3. Add 2-3 drops of indicator
4. Start adding from the burette, swirling constantly, until the indicator changes colour. Record
how much solution was added (rough titre)
, 5. Repeat to get concordant results and calculate a mean titre
Measuring Enthalpy Change of Combustion - CORRECT ANSWER-1. Measure 100cm³ of water
into a calorimeter
2. Weigh the spirit burner
3. Measure initial temperature of the water
4. Clamp calorimeter above spirit burner
5. Light the spirit burner
6. Heat until the temperature rises by 15°C. Stir and record final temperature
7. Reweigh spirit burner
8. Calculate temperature change and heat energy change (q=mcAT)
9. Calculate mass of fuel used and moles of fuel used. Calculate energy change per mole.
Measuring Enthalpy Change of Neutralisation - CORRECT ANSWER-1. Place polystyrene cup in
glass beaker
2. Measure out 25cm³ of 1moldm³ HCl and transfer to polystyrene cup
3. Stir and record temperature
4. Measure out 25cm³ of 1moldm³ NaOH into another measuring cylinder.
5. Add NaOH to HCl, stir and record the highest temperature reached
6. Calculate temperature change and q=mcAT
7. Calculate moles of acid used and water formed, and the enthalpy of neutralisation
Investigating Effect of Temperature on Rate of Reaction - CORRECT ANSWER-1. Measure out
50cm³ of aqueous solution A and pour into a clean dry 250cm³ conical flask
2. Measure out 5cm³ of aqueous solution B and pour into test tube
3. Place conical flask on a piece of laminated paper with a cross. Add the acid and start the
stopwatch
Experiments QUESTIONS AND VERIFED
CRRECT ANSWERS GRADED A+
LATEST 2026-2027 100% GUARANTEED
PASS
Make Up a Volumetric Solution - CORRECT ANSWER-1. Weigh dry weighing boat
2. Place mass of solid into the boat and weigh accurately
3. Pour solid into a beaker. Reweigh empty weighing boat and calculate how much was
transferred
4. Add deionised water and stir with glass rod until dissolved
5. Funnel into a volumetric flask
6. Make up to mark with deionised water until bottom of meniscus is on the mark
7. Stopper and invert to mix
Acid-Base Titration - CORRECT ANSWER-1. Fill a burette
2. Use a pipette to transfer 25cm³ of the other solution into the conical flask
3. Add 2-3 drops of indicator
4. Start adding from the burette, swirling constantly, until the indicator changes colour. Record
how much solution was added (rough titre)
, 5. Repeat to get concordant results and calculate a mean titre
Measuring Enthalpy Change of Combustion - CORRECT ANSWER-1. Measure 100cm³ of water
into a calorimeter
2. Weigh the spirit burner
3. Measure initial temperature of the water
4. Clamp calorimeter above spirit burner
5. Light the spirit burner
6. Heat until the temperature rises by 15°C. Stir and record final temperature
7. Reweigh spirit burner
8. Calculate temperature change and heat energy change (q=mcAT)
9. Calculate mass of fuel used and moles of fuel used. Calculate energy change per mole.
Measuring Enthalpy Change of Neutralisation - CORRECT ANSWER-1. Place polystyrene cup in
glass beaker
2. Measure out 25cm³ of 1moldm³ HCl and transfer to polystyrene cup
3. Stir and record temperature
4. Measure out 25cm³ of 1moldm³ NaOH into another measuring cylinder.
5. Add NaOH to HCl, stir and record the highest temperature reached
6. Calculate temperature change and q=mcAT
7. Calculate moles of acid used and water formed, and the enthalpy of neutralisation
Investigating Effect of Temperature on Rate of Reaction - CORRECT ANSWER-1. Measure out
50cm³ of aqueous solution A and pour into a clean dry 250cm³ conical flask
2. Measure out 5cm³ of aqueous solution B and pour into test tube
3. Place conical flask on a piece of laminated paper with a cross. Add the acid and start the
stopwatch
