01 b we on acid

Question 1

) Carrying out an acid-base titration

Answer 1

• Rinse equipment (burette with acid, pipette with alkali, conical
flask with distilled water).
• Pipette 25 cm3 of alkali into conical flask.
• Fill burette with acid.
• Make sure the jet space in the burette is filled with acid.
• Record initial burette reading.
• Add a few drops of indicator.
• Use a white tile underneath the flask to help observe the
colour change.
• Add acid to alkali whilst swirling the mixture and add acid
dropwise near endpoint.
• Stop adding acid when relevant colour change is observed.
• Record final burette reading.
• Repeat titration until at least 2 concordant results are
obtained (two readings within 0.1 of each other).

Question 2

carry out titration full steps

Answer 2

Rinse equipment (burette with acid, pipette with alkali, conical
flask with distilled water).
• Pipette 25 cm3 of alkali into conical flask.
• Fill burette with acid.
• Make sure the jet space in the burette is filled with acid.
• Record initial burette reading.
• Add a few drops of indicator.
• Use a white tile underneath the flask to help observe the
colour change.
• Add acid to alkali whilst swirling the mixture and add acid
dropwise near endpoint.
• Stop adding acid when relevant colour change is observed.
• Record final burette reading.
• Repeat titration until at least 2 concordant results are
obtained (two readings within 0.1 of each other).

Question 3

steps 1 - 3

Answer 3

Rinse equipment (burette with acid, pipette with alkali, conical
flask with distilled water).
• Pipette 25 cm3 of alkali into conical flask.
• Fill burette with acid.

Question 4

steps 4-6

Answer 4

• Make sure the jet space in the burette is filled with acid.
• Record initial burette reading.
• Add a few drops of indicator.

Question 5

steps 7 -8

Answer 5

• Use a white tile underneath the flask to help observe the
colour change.
• Add acid to alkali whilst swirling the mixture and add acid
dropwise near endpoint.

Question 6

steps 9 -11

Answer 6

• Stop adding acid when relevant colour change is observed.
• Record final burette reading.
• Repeat titration until at least 2 concordant results are
obtained (two readings within 0.1 of each other).

Question 7

steps 1 and 2

Answer 7

• Rinse equipment (burette with acid, pipette with alkali, conical
flask with distilled water).
• Pipette 25 cm3 of alkali into conical flask.

Question 8

steps 3 and 4

Answer 8

• Fill burette with acid.
• Make sure the jet space in the burette is filled with acid.
• Record initial burette reading.

Question 9

steps 4 and 5

Answer 9

• Add a few drops of indicator.
• Use a white tile underneath the flask to help observe the
colour change.

Question 10

steps 6 and 7

Answer 10

• Add acid to alkali whilst swirling the mixture and add acid
dropwise near endpoint.
• Stop adding acid when relevant colour change is observed.

Question 11

steps 8 and 9

Answer 11

• Record final burette reading.
• Repeat titration until at least 2 concordant results are
obtained (two readings within 0.1 of each other).