Lec 3

Question 1

How to minimise titrant error

Answer 1

1) choose solution whose physical property change is easily observed
2) use correct indicator
3) if end point is close to equivalence point this error is minimised

Question 2

End point VS equivalence point

Answer 2

End point is practical result that is seen in a titration whereas equivalence point is ideal theoretical result that is seen in a titration

Question 3

Weak acid - weak base

Answer 3

PH is 7

Question 4

Weak acid - strong base

Answer 4

PH is more than 7

Question 5

Strong acid-weak base

Answer 5

PH is less than 7

Question 6

2 different techniques for automated titration to determine the equivalence point

Answer 6

1) incremental addition
-adding certain fixed amount every time until it determine the equivalence point
2) continuous addition
-depend on the potential voltage change and slope of titration by adding certain amount