U4-4-3 - Back Titrations

Question 1

Give a reason for using back titration instead of regular titration.

Answer 1

One of:

analyte is insoluble
only partially soluble in water
very volatile

Question 2

Outline the procedure needed to determine mass of calcium carbonate in egg shell by back titration.

1. React calcium carbonate with ____________ (A) of known volume and concentration.
2. Titrate with a second reagent (B) to determine the quantity of A remaining.

Answer 2

React calcium carbonate with excess reagent (A) of known volume and concentration.

Titrate with a second reagent (B) to determine the quantity of A remaining.

Question 3

Outline the procedure needed to determine mass of calcium carbonate in egg shell by back titration.

1. React calcium carbonate with excess reagent (A) of____________.
2. Titrate with a second reagent (B) to determine the quantity of A remaining.

Answer 3

React calcium carbonate with excess reagent (A) of known volume and concentration.

Titrate with a second reagent (B) to determine the quantity of A remaining.

Question 4

Outline the procedure needed to determine mass of calcium carbonate in egg shell by back titration.

1. React calcium carbonate with excess reagent (A) of known volume and concentration.
2. ____________ (B) to determine the quantity of A remaining.

Answer 4

React calcium carbonate with excess reagent (A) of known volume and concentration.

Titrate with a second reagent (B) to determine the quantity of A remaining.