Ferrous Ammonium Sulphate Chloride

Ferrous ammonium sulphate Ferrous chloride Ferrous sulphate Lead nitrate Lithium chloride... 

Experiment Prepare a solution of a ferrous salt by dissolving 2 grams of ferrous ammonium sulphate in 20 cc. of water, adding a little dilute sulphuric acid and a piece of iron wire. Test both this solution and a solution of a ferric salt (nitrate or chloride) with potassium ferrocyanide, potassium ferricyanide, and potassium sulphocyanate. Tabulate the results. These constitute the standard tests for ferrous and ferric salts. Write equation. 

This method is suitable for almost all azo dyes and some other water-soluble dyes. The titration should be conducted in a well-ventilated fume hood. A dye sample is dissolved in a hydrochloric acid solution. An excess amount of titanous chloride solution is added into the boiling acidic dye solution under the protection of a CO, atmosphere. A back titration is then conducted using a standardised ferrous ammonium sulphate solution with ammonium thiocyanate as the indicator. The titanous chloride solution should be freshly standardised. 

Materials Solutions of sodium chloride, calcium chloride, zinc sulphate, ferrous ammonium sulphate, copper sulphate, arsenic chloride, hydrogen sulphide, ammonium sulphide. 

Directions Put 5 c.c. of solutions of sodium chloride, calcium chloride, zinc sulphate, ferrous ammonium sulphate, copper sulphate, and arsenic chloride into separate test tubes and add 10 c.c. of hydrogen sulphide solution, (either some that you made in Experiment 56, or some of the laboratory reagent) into each. 

Materials Solutions of ferric chloride, of ferrous ammonium sulphate, of potassium ferrocyanide, of potassium ferricyanide, of ammonium thiocyanate. 

Directions Put 5 c.c. of ferric chloride solution into a small test tube, fill the tube with water, shake the solution and then pour a third of it into each of two other test tubes. Dilute and divide into thirds in the same way 5 c.c. of ferrous ammonium sulphate solution. Add a few drops of solutions of potassium ferrocyanide, of potassium ferricyanide, and of ammonium thiocyanate to the three solutions of ferric chloride respectively and likewise to the three solutions of ferrous ammonium sulphate. (1) Tabulate the results obtained in these six tests. (2) Do the results indicate the presence of any ferric salt in the ferrous salt Would you expect the production of any color in the absence of ferric salts (3) State one test for a ferrous salt and two tests for a ferric salt. 

Ferric Chloride Ferric Chloride. Ferric Chloride Ferric Chloride. Ferric Chloride Ferric Hydroxide Ferric Nitrate Ferric Sulphate. Ferrous Chloride Ferrous Sulphate Ferrous Ammonium... 

Potassium chromate may be used as an indicator producing a red colour with excess Ag ion. More widely applicable is the method of back titration. Excess AgNOj is added to the sample containing chloride or bromide ions. The excess AgNOj is then titrated with ammonium thiocyanate and ammonium ferrous sulphate is used as an indicator of excess SCN. ... 

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