Ferric hydroxide sol can be prepared from freshly perpared ferric hydroxide precipitate. It can also be prepared by adding ferric chloride solution to boilling water. In both cases the sol particles are positively charged. Name the above two methods of preparation of ferric hydroxide sol.

Ferric hydroxide sol can be prepared from freshly prepared ferric hydroxide precipitate. It can also be prepared by adding ferric chloride solution to boiling water. In both cases the sol particles are positively charged. What happenswhen an electric pot ential is applied across two platinum electrodes dipping in" ferric hydroxide sol? Explain.

Colloids are an intermediate between suspension and solutions. Suggest suitable method for the preparation of the following sol:Ferric hydroxide sol

Explain what is observed. An electrolyte, NaCI is added to hydrated ferric hydroxide sol.

What happens when an electric is applied across two platimum electrodes dipping in ferric hydroxide sol? Explain.

On adding few drops of dil, HCl to freshly precipitated ferric hydroxide, a red coloured colloidal solution is obtained. This phenomenon is known as

In an attempt to prepare ferric hydroxide sol by adding small amount of ferric chloride to water, one person got a precipitate of ferric hydroxide. How can you help him to convert Fe(OH)_3 precipitate to Fe(OH)_3 sol?

Account for the following: Ferric hydroxide sol Is more readily coagulated by Na_3PO_4 In comparison to KCI.

For the coagulation of 50 ml of ferric hydroxide sol. 10 mL of 0.5 MKCl is required. What is the coagulation value of KCI?

Aluminium is prepared industrially by Hall- Heroult process. Various steps in the concentration of ore are given below. Write them in the correct order. i)The precipitate formed is separated, washed and strongly heated to get alumina. ii) Crushed bauxite is leached with hot sodium hydroxide solution. iii) Impurities are removed from the sodium aluminate solution by filtration. iv) Solution is diluted after adding a little aluminium hydroxide, to precipitate aluminium hydroxide .

As_2 S_3 sol particles are negatively charged. The. sol can be precipitated by adding BaCl_2 , solution. a How do you account for thè process? b. AICl_3 , is more efficient than BaCl_2 , in coagulating tbe sol. Justify. c. Throwing of electrical sand particles on clouds causè artificial rain. How will you describe this?