Which solubility rule is incorrect unless the anions are pairs with the alkali m

Question

Which solubility rule is incorrect unless the anions are pairs with the alkali metals or ammonium ion?

Carbonates are insoluble.

Hydroxides and oxides are soluble.

Phosphates, arsenates, and chromates are insoluble.

Sulfates are soluble except with calcium, strontium, barium, silver, mercury and lead.  

Carbonates are insoluble.

Hydroxides and oxides are soluble.

Phosphates, arsenates, and chromates are insoluble.

Sulfates are soluble except with calcium, strontium, barium, silver, mercury and lead.  

Explanation / Answer

Statement (b) is incorrect. Hydroxides and oxides are insoluble in water. Except for alkaline, alkaline earth and ammonium ions the hydroxides and oxides of transition metals are insoluble. For example hydroxides like aluminium hydroxides, ferric hydroxide, cobalt hydroxides etc. and oxides like aluminium oxide, ferric oxide, cobalt oxide etc. are all insoluble in water.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.