Question

The cations of group III A can be detected by
(a) noting the colour of the ppt. (b) by solubility in NaOH
(c) by solubility in H,O,
(d) by chemical tests only​

Answer 1

It is an important chemical reagent and industrial chemical, used primarily in the production of cellulose acetate for photographic film, polyvinyl acetate for wood glue, and synthetic fibres and fabrics. In households, diluted acetic acid is often used in descaling agents.

Answer 2

The cations of group III-A can be detected by a) noting the color of the ppt.

• The color of the precipitate is white gelatinous which is the solid form of Al(OH)3
• The cation is not fully soluble in sulfides, so we can precipitate them by adding a basic solution of H2S
• The presence of various cations is identified through the different tests.
• Blue color means copper or nickel salts, light green means ferrous salts, dark green chromium salts, dark brown ferric salts, light pink manganese salts, and white indicates the absence of Cu, Ni, Fe, Mn, and Co salts.