Unit 9 Vocab - Solutions

What is an amphoteric substance?

• A substance that can act as both an acid and a base

• A substance that can only act as an acid

• A substance that can only act as a base

• A substance that is neither an acid nor a base

What is an anylate in a titration?

• A substance that is being analyzed or measured

• A substance that changes color at the endpoint

• A solution of known concentration

• A device used to measure volume

An Arrhenius acid is a substance that:

• increases the concentration of hydroxide ions in solution

• increases the concentration of hydrogen ions in solution

• decreases the concentration of hydrogen ions in solution

• decreases the concentration of hydroxide ions in solution

An Arrhenius base is a substance that:

• increases the concentration of hydroxide ions (OH-) in aqueous solution.

• decreases the concentration of hydroxide ions (OH-) in aqueous solution.

• increases the concentration of hydrogen ions (H+) in aqueous solution.

• decreases the concentration of hydrogen ions (H+) in aqueous solution.

A Bronsted-Lowry acid is a substance that:

• donates a proton

• accepts a proton

• donates an electron

• accepts an electron

A Bronsted-Lowry base is a substance that:

• donates a proton.

• accepts a proton.

• donates an electron.

• accepts an electron.

An electrolyte is a substance that:

• conducts electricity when dissolved in water

• does not conduct electricity

• is always a solid

• is a type of metal

What is the end-point in a titration?

• The point at which the reaction is complete

• The point at which the solution changes color

• The point at which the solution reaches a pH of 7

• The point at which the solution is neutralized

The equivalence point in a titration is:

• the point at which the amount of titrant added is exactly enough to completely neutralize the analyte solution.

• the point at which the color of the solution changes.

• the point at which the pH of the solution is 7.

• the point at which the reaction starts.

A hydronium ion is:

• a negatively charged ion

• a positively charged ion formed when an acid dissolves in water

• a neutral molecule

• a type of salt

Tags

NGSS.HS-PS1-5