Final answer:
Human blood (pH 7.4) is slightly basic, household ammonia (pH 11.0) is basic, and cherries (pH 3.6) are acidic, determined by the pH scale.
Step-by-step explanation:
To identify each substance as acidic, basic, or neutral based on their pH levels, one can use the pH scale as a reference where a pH less than 7 is considered acidic, a pH of 7 is neutral, and a pH greater than 7 is basic. Given this information:
- Human blood with a pH of 7.4 is slightly basic.
- Household ammonia with a pH of 11.0 is quite basic (also known as alkaline).
- Cherries with a pH of 3.6 are acidic.
Acids and bases have distinct properties and can neutralize each other when mixed. For instance, blue litmus paper turns red in the presence of an acid while red litmus paper turns blue in a basic solution.