4.5 Properties of Acids and Bases

Which characteristic describes bases?

• taste sour

• feel slippery

• react with metals

• remove rust

Which substances are acids? Check all that apply.

• AgOH

• HF

• NiOOH

• NH4OH

• HMnO4

Which substances are bases? Check all that apply.

• NaOH

• H3BO3

• KOH

• NaCl

• Ca(OH)2

Identify some acids that are found in everyday materials.

• lemon juice

• baking soda

• dish detergent

• vinegar

• hand soap

Which of the following are properties of both acids and bases? Check all that apply.

• taste sour

• feel slippery

• react with nonmetals

• conduct electricity

• cause burns

Abdul has mislabeled three baking containers. They hold baking soda (a base), cream of tartar (an acid), and powdered sugar (neither acid nor base), but he doesn’t know which is which. Help him identify each sample based on the observations he has noted in the table.

Sample A is the..

• cream of tartar

• powdered sugar

• baking soda.

Tags

NGSS.MS-PS1-2

Abdul has mislabeled three baking containers. They hold baking soda (a base), cream of tartar (an acid), and powdered sugar (neither acid nor base), but he doesn’t know which is which. Help him identify each sample based on the observations he has noted in the table.

Sample B is the..

• cream of tartar

• powdered sugar

• baking soda.

Tags

NGSS.MS-PS1-2

Abdul has mislabeled three baking containers. They hold baking soda (a base), cream of tartar (an acid), and powdered sugar (neither acid nor base), but he doesn’t know which is which. Help him identify each sample based on the observations he has noted in the table.

Sample C is the..

• cream of tartar

• powdered sugar

• baking soda.

Tags

NGSS.MS-PS1-2

Etching is a process for producing images on metal plates that can be copied using a printing press. First, the metal plate is coated in a layer of wax. Next, an artist creates the image by scratching lines in the wax to reveal the metal. Finally, the plate is dipped in a liquid called the mordant, which eats away at the metal where the wax has been scraped away. This leaves an engraving in the plate that can pick up ink for printing.

To break down the metal plate, the mordant should be composed of a(n)

• acidic substance.

• basic substance.

• neutral substance.

Tags

NGSS.MS-PS1-2