Acids and Bases

What is an acid?

• A substance that donates hydrogen ions (H+) in a solution, typically having a sour taste and a pH less than 7.

• A substance that accepts hydrogen ions in a solution, typically having a bitter taste and a pH greater than 7.

• A neutral substance that does not affect the pH of a solution.

• A substance that reacts with metals to produce hydrogen gas.

What is the effect of increasing hydroxide ion concentration in a solution?

• It makes the solution more acidic, resulting in a lower pH.

• It has no effect on the pH of the solution.

• It makes the solution more basic, resulting in a higher pH.

• It converts the solution into a neutral state.

What is the taste of bases?

• Sweet and sugary

• Bitter and slippery

• Sour and tangy

• Salty and dry

What is the taste of acids?

• Sweet

• Bitter

• Sour

• Salty

What is neutralization?

• A chemical reaction between two acids that produces a gas.

• A chemical reaction between an acid and a base that produces water and a salt.

• A process of adding a base to an acid to increase its pH without a reaction.

• A method of separating mixtures using chemical reactions.

What is the pH of pure water?

• 5

• 7

• 9

• 6

What is a base?

• A substance that accepts hydrogen ions (H+) or donates hydroxide ions (OH-) in a solution, usually having a bitter taste and a pH greater than 7.

• A substance that donates hydrogen ions (H+) and has a pH less than 7.

• A substance that has a sour taste and turns blue litmus paper red.

• A substance that does not react with acids and has a pH of 7.

What is the pH scale?

• A measure of temperature in solutions

• A measure of how acidic or basic a solution is, ranging from 0 to 14

• A scale used to measure the density of liquids

• A method for determining the color of a solution

What happens when an acid reacts with a metal?

• It produces oxygen gas and a base.

• It produces hydrogen gas and a salt.

• It produces carbon dioxide and water.

• It produces nitrogen gas and a metal oxide.

What is a strong acid?

• An acid that partially dissociates in water

• An acid that completely dissociates in water, releasing all of its hydrogen ions, such as sulfuric acid (H2SO4)

• An acid that does not dissociate in water

• An acid that has a pH of 7 or higher