Acids, Bases, and Salts Online Quiz

LiF is a salt of a strong base (LiOH) and a weak acid (HF). In aqueous solution, the F- ion undergoes hydrolysis to form HF and OH-, making the solution basic.

pOH = -log(0.005) = 2.3. pH = 14 - 2.3 = 11.7. Both B and D are numerically correct, but B is the standard format.

pH = -log(0.001) = 3.0. Both B and C are numerically correct.

The pH scale ranges from 0 to 14. Solutions with a pH greater than 7 are basic, while those with a pH less than 7 are acidic.

The pH scale measures acidity and alkalinity. A pH value less than 7 indicates an acidic solution.

NaOH, LiOH, and Ca(OH)2 are strong bases that dissociate completely in water. Ammonia (NH3) is a weak base because it only partially reacts with water to form hydroxide ions.

HCl, HBr, and HI are strong acids that dissociate completely. HF is a weak acid because the bond between hydrogen and fluorine is strong, leading to incomplete dissociation.

A conjugate base is formed when an acid loses a proton. In this reaction, HCN loses a proton to become CN-.

A Bronsted-Lowry acid is a proton donor. HCN donates a proton to H2O in this reaction, making it the acid.

According to Bronsted-Lowry theory, when an acid donates a proton, the resulting species is its conjugate base.

A hydrogen atom consists of one proton and one electron. When it loses its electron to become an ion (H+), only the proton remains.

Arrhenius defined an acid as a substance that increases the concentration of hydrogen ions (H+) in an aqueous solution.