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question 18
which solution is the most basic or alkaline?
a. ph 11
b. ph 1
c. ph 9
d. ph 5
e. ph 7

Explanation:

Step1: Recall pH scale properties

The pH scale ranges from 0 - 14. A pH of 7 is neutral. Values less than 7 are acidic, and values greater than 7 are basic (alkaline). The higher the pH value above 7, the more basic the solution.

Step2: Compare given pH values

• Option a: pH = 11 (basic)
• Option b: pH = 1 (acidic)
• Option c: pH = 9 (basic)
• Option d: pH = 5 (acidic)
• Option e: pH = 7 (neutral)

Since 11>9>7 and 1 < 7, 5 < 7.

Answer:

A. pH 11