Question

Calculate the amount of F.A.S. required to prepare M/20 standard solution of F.A.S.​

Answer 1

Explanation:

Prepare 250 ml of M/20 Mohr's salt solution by dissolving 4.9 g of Mohr's salt in water 20 as described in experiment 11.3. ...

Rinse and fill the burette with the given KMn04 solution.

Add one test-tube (~ 20 ml) full of dilute sulphuric acid (~ 2 M) to the solution in titration flask.

Answer 2

Explanation:

Chemical Equations

prepare-m20-solution-of-ferrous-ammonium-sulphate-1

Indicator

KMnO4 is a self-indicator.

End Point

Colourless to permanent pink colour (KMnO4 in burette).

Procedure

Prepare 250 ml of M/20 Mohr’s salt solution by dissolving 4.9 g of Mohr’s salt in water 20 as described in experiment 11.3. Rinse the pipette with the M/20 Mohr’s salt solution and pipette out 20.0 ml of it in a washed titration flask.

Rinse and fill the burette with the given KMn04 solution.

Add one test-tube (~ 20 ml) full of dilute sulphuric acid (~ 2 M) to the solution in titration flask.

Note the initial reading of the burette.

Now add KMnO4 solution from the burette till a permanent light pink colour is imparted to the solution in the titration flask on addition of last single drop of KMnO4 solution.

Hope that it will help you❤❤