Question

1. identify all the properties of an acid.

a) bitter taste
b) corrosive
c) ph level less than 7
d) sour taste
e) slippery feel

1. identify all the properties of a base.

a) ph value less than 7
b) bitter taste
c) sour taste
d) corrosive
e) ph value greater than 7

1. what is the safest way can you find the ph of an unknown substance

a) taste the substance
b) use ph paper or litmus paper
c) touch the substance with your hands
d) smell the substance

1. lemon juice tastes sour. what can you infer about the lemon juice?

a) lemon juice is a base
b) lemon juice is an acid
c) lemon juice is a neutral

Explanation:

• For question 3, acids have a sour taste, are corrosive, and have a pH level less than 7.
• For question 4, bases have a bitter taste and a pH value greater than 7.
• For question 5, using pH or litmus paper is the safest way to find the pH of a substance as tasting, touching, or smelling can be dangerous.
• For question 6, since lemon - juice tastes sour, it is an acid.

Answer:

1. B. corrosive, C. pH level less than 7, D. sour taste
2. B. bitter taste, E. pH value greater than 7
3. B. use pH paper or litmus paper
4. B. lemon juice is an acid