Question

Prepare m/20 solution of ferrous ammonium sulphate and find molarity and strenght

Answer 1

To find out the Molarity and strength of ferrous sulfate(Mohr salt) using kmon4

1. Prepare 250ml of m/20 Mohr salt solution.

2. Weigh Accurately 4.9g of Mohr salt in and dissolve in 250 ml distilled water.

3. Pipette out 20ml Mohr solution in a cleaned conical flask.

4. Fill the burette with a Solution of Kmno4.

5. Add dilute sulfuric acid in a conical Flask.

6. Titrate Mohr salt solution against Kmon4 till a permanent pink color.

7. Note the final readings from the initial point.

8. Repeat the experiment 4 times to obtain concordant readings.