Question

Indicate what precipitates, if any, form when solutions of each of the following are added to a solution containing the group I cations. Write net ionic equations for the precipiation reactions that occur. Use he Ksp tabels in textbook.

a) HBr (aq)

b) H2SO4 (aq)

Answer 1

# reaction alakali metal Hydroxides(Source of alakali metal ions and react with acids) with HBr and H₂SO₄ Gives corresponding metal bromides and sulfates.

Li⁺ + HBr LiBr + H+

Na⁺ + HBr    NaBr + H+

K⁺ + HBr KBr + H+

Rb⁺ + HBr RbBr + H+

# All alkali metal bromides( Product in the each of the above reactions) are soluble.

Li⁺ + H₂SO₄ LiSO₄ + H+

Na⁺ + H₂SO₄    NaSO₄  + H+

K⁺ + H₂SO₄KSO₄ + H+

Rb⁺ + H₂SO₄ RbSO₄  + H+

# All the alkali metal sulfates are soluble.