Prepare m 20 standard solution of ferrous ammonium sulphate
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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 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.
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