1. When dissolved in water, RbOH behaves as _____.

a base that forms Rb+ and OH- ions.
an acid that forms RbO- and H+ ions.
a base that forms RbO- and H+ ions.
an acid that forms Rb+ and OH- ions.

2. Which of the compounds H3PO4 , Mg(OH)2, LiOH, and HCl, behaveas bases when they are dissolved in water?

H3PO4 and HCl
only LiOH
only HCl
Mg(OH)2 and LiOH

3. Which of the following compounds will undergo a gas-evolvingreaction in an aqueous solution?

HF
CH3COOH
HCl
H2CO3
H2SO4