Question

use the text to compare and contrast bases and acids. an acid is defined as a chemical compound that has a ph of less than 7.0. a base is the chemical opposite of an acid; it has a ph of greater than 7.0. to better understand the two, it can help to think of some household examples. an acid tastes tart or sour; vinegar and lemon juice are both acids. by contrast, a base tastes bitter; soap and baking soda are good examples. depending on the temperature, acids can be in solid, liquid, or gaseous form, whereas bases are usually solids. when conducting experiments, a chemist may perform a litmus test to determine whether a compound is an acid or base. acids change litmus paper to red, while bases cause litmus paper to turn blue. bases acids have a ph less than 7.0 taste sour are usually solids change litmus paper to red

Explanation:

According to the text, an acid has a pH less than 7.0, tastes sour, can be in various forms, and turns litmus paper red. A base has a pH greater than 7.0, tastes bitter, is usually a solid, and turns litmus paper blue.

Answer:

Have a pH less than 7.0: Bases - □, Acids - ■
Taste sour: Bases - □, Acids - ■
Are usually solids: Bases - ■, Acids - □
Change litmus paper to red: Bases - □, Acids - ■