Question

Which of the following best describes an alkali?

A. Any substance with a pH above 7.
B. A soluble solid that forms H+ ions in a solution.
C. A soluble solid that has a pH above 7.
D. An insoluble solid that forms OH-ions in a solution.

Answer 1

C A soluble solid that forms H+ ions in a solution

Step-by-step explanation:

founders ed

Answer 2

A. Any substance with a pH above 7.

Step-by-step explanation:

On the pH scale substances whose value is greater than 7 and less than 14 are termed alkali.

Acids have a pH of less than 7 whereas neutral compounds such as water has pH of 7.

• An alkali is any substance that produces excess hydroxyl ion in solutions.
• Water soluble bases are known as alkali.
• They are usually certain metallic oxides, metallic hydroxides and aqueous ammonia.