Chemistry Final Review

How do antacids like Tums work?

• Antacids are acidic to increase stomach acid.

• Antacids are basic to neutralize stomach acid.

• Antacids are basic to increase stomach acid.

• Antacids are pH-balanced to neutralize stomach acid.

Which statement is true?

• All acid-base reactions produce water.

• Only strong acids and bases can react together.

• Some acid-base reactions produce water and salt.

• Acid-base reactions always need a catalyst.

Which property is shared by all Arrhenius acids?

• They have the same pH value.

• They contain hydroxide ions.

• They donate H+ ions in solution.

• They are strong acids.

What is the relationship between the pH scale and H+ concentration?

• pH increases linearly with H+ concentration

• pH is directly proportional to H+ concentration

• pH is inversely proportional to H+ concentration

• pH is logarithmically related to H+ concentration

A Bronsted-Lowry acid...

• always contains hydroxide ions.

• accepts protons in a reaction.

• donates protons in a reaction.

• must contain oxygen.

What happens when a strong base completely dissociates in water?

• The solution becomes cloudy

• The temperature always increases

• All OH- ions separate from the compound

• The pH decreases below 7

A weak base…

• partially dissociates (comes apart) in water.

• is always less dangerous than a strong base.

• has a pH less than 7.

• cannot react with acids.

Which characteristic does NOT describe an acid?

• They taste sour.

• They feel slippery to the touch.

• They turn blue litmus paper red.

• They react violently with water.

Which statement about pH is true?

• A) A change of 2 pH units represents a 40-fold change in H+ concentration.

• B) Only acids have measurable pH values.

• C) A pH of 7 indicates a strong acid.

• D) A change of 1 pH unit represents a 10-fold change in H+ concentration.

The key difference between the Bronsted-Lowry and Arrhenius definitions is…

• only Arrhenius acids produce H+ ioins.

• Bronsted-Lowry bases must contain OH- ions.

• Bronsted-Lowry bases can accept H+ without containing OH-.

• Only Bronsted-Lowry acids can react with water.