In this experiment you will use a solution of sodium carbonate, Na2CO3, to determine the concentration of a solution of hydrochloric acid, HCl, by carrying out a titration - CIE - A-Level Chemistry - Question 1 - 2018 - Paper 1
Question 1
In this experiment you will use a solution of sodium carbonate, Na2CO3, to determine the concentration of a solution of hydrochloric acid, HCl, by carrying out a tit... show full transcript
Worked Solution & Example Answer:In this experiment you will use a solution of sodium carbonate, Na2CO3, to determine the concentration of a solution of hydrochloric acid, HCl, by carrying out a titration - CIE - A-Level Chemistry - Question 1 - 2018 - Paper 1
Step 1
Fill a burette with FA 2
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Answer
Begin by ensuring that the burette is properly cleaned and rinsed with FA 2. Following this, fill the burette with the hydrochloric acid solution, FA 2. Make sure to take care to eliminate any air bubbles and record the initial reading of the burette.
Step 2
Use the pipette to transfer 25.0 cm³ of FA 1 into a conical flask
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Using the pipette, carefully transfer exactly 25.0 cm³ of the sodium carbonate solution, FA 1, into the conical flask. Be sure to avoid any spillage.
Step 3
Add a few drops of methyl orange indicator
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Introduce a few drops of methyl orange indicator into the conical flask containing the sodium carbonate solution. This will allow you to visually determine the endpoint of the titration by observing the color change.
Step 4
Perform a rough titration and record your burette readings
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Gradually release the hydrochloric acid from the burette into the flask while swirling it gently. Observe for a color change in the solution, which indicates the endpoint of the reaction. Record the final reading of the burette as well as calculate the rough titre by subtracting the initial reading from the final reading.
