titration curves

Question 1

Hpw do we calibrate?

Answer 1

= measure known PH of buffer solution- as PH meters can
= rinse with distilled ater many times,
loose accuracy on storage
= putting probe in set buffer, and pressing calibration button
= imporv eaccracy by maintaining temperature

Question 1

How to construct a PH curve?

Answer 1

= transfer 25cm^3 of acid into a conical flask using a pippete
= measure intial PH using an PH meter
= add alkali in small smounts, ntoing the volume added, birrute
= stir mixture to equalise the PH
= measure PH
= repeat
= add until alkali in excess

Question 2

What is strong base strong acid curve?

Answer 2

= steep part around 3-9
= equalivalence point at 7
= starts at 1
= cm^3 of base is 25cm^3

Question 3

What is weak acid strong base?

Answer 3

= start PH rises quickly, flattened part is buffer region, formed when buffer solution is made
= PH starts near 3
= equivalence 7
= steep around 7 to 9

Question 4

What is strong acid weak base?

Answer 4

= starts at 1
= equvle ce point less than 7
= steep part around <7 4 to 7

Question 5

What is weak acid weak base?

Answer 5

= no steep curve