Ch 21 acids/bases

What is the key acid in your stomach?

• acetic acid

• sulfuric acid

• formic acid

• hydrochloric acid

People in ancient times recognized acids and bases by their:

• names

• chemical formulas

• properties

• components

Arrhenius defined an acid as a substance that releases ___ in water.

• hydronium ions

• hydrogen ions

• hydroxide ions

• water molecules

Which of the following is a polyprotic acid?

• H₂CO₃

• HCl

• NaOH

• CaSO₄

Which is NOT a characteristic of acids?

• produce hydroxide ions

• taste sour

• produce electrolytic solutions

• neutralize bases

What kind of reaction is the corrosion of a metal by an acid?

• composition reaction

• single-replacement reaction

• decomposition reaction

• double replacement reaction

What is the major component of antacids?

• acids

• bases

• salts

• salts and acids

A solution that has an excess of hydroxide ions:

• is acidic

• has a pH less than 7

• is alkaline

• has a pH equal to 7

Which of the following NOT an indicator?

• litmus

• phenolphthalein

• anthocyanins

• pH meter

The strength of an acid is determined mainly by:

• the molecular mass of the acid

• degree of ionization of molecules

• the number of ionizable hydrogens

• number of atoms in the molecule