Methods

Date: 2015-10-07; view: 477.

Experiment 1

3 cm³of iron (III) ions solution was mixed with 3cm³ of iodide ions solution in a test tube. After, 0.5 cm³ of starch was added to the solution.

Experiment 2

3 cm³ of sodium chlorate (I) solution was mixed with 3 cm³ of iron (II) ions solution. Then pH level was checked by use of indicator paper. After, few drops of ammonium thiocyanate were added.

Experiment 3

3 cm³ of sodium chlorate (I) solution was mixed with 3 cm³ of bromide ions solution and pH level was checked by indicator paper. After, few drops of dilute sulphuric acid were added to neutralize solution and solution was checked for pH level again. Then 1 cm³ of kerosene was added to solution and test tube was shaken.

4^th and 5^th experiments were not held, only predictions were made for arranging redox pairs in the order of oxidizing strength.

Experiment 6

3 cm³ of chlorate (I) ions solution was mixed with 3 cm³ of iodide ions solution. Then 0.5 cm³ of starch was added to the solution.

Experiment 7

3 cm³ of sodium chlorate (I) was mixed with 1 cm³ of hydrogen peroxide. After, glowing splint was put in the test tube.

Experiment 8

2 cm³ of potassium iodide solution was acidified with of dilute sulphuric acid. Then, 1 cm³ of hydrogen peroxide was added. Afterwards, 1 cm³ of kerosene was added to the solution.

Experiment 9

1 cm³ of manganase (IV) oxide was mixed with 3 cm³ of hydrogen peroxide.