Question

1. the ph of a strong base would be closest to

oa) 0
ob) 7
oc) 14

1. the ph of a strong acid would be closest to

oa) 0
ob) 7
oc) 14

1. when testing a substance with ph/ litmus paper you observe that the paper turns red. what kind of substance

a) acid
b) base
c) neutral

1. neutralization is a reaction between a(n).

a) salt and water
b) base and salt
c) acid and metal
d) acid and base

Explanation:

Step1: Recall pH scale properties

The pH scale ranges from 0 - 14. A pH of 7 is neutral. Acids have pH values less than 7 and bases have pH values greater than 7.

Step2: Determine pH of strong base

A strong base has a high concentration of hydroxide ions and its pH is closest to 14. So for question 7, the answer is C.

Step3: Determine pH of strong acid

A strong acid has a high concentration of hydrogen ions and its pH is closest to 0. So for question 8, the answer is A.

Step4: Understand litmus - paper test

Blue litmus paper turns red in an acidic solution. So for question 9, the answer is A.

Step5: Recall neutralization reaction

Neutralization is a reaction between an acid and a base to form a salt and water. So for question 10, the answer is D.

Answer:

1. C. 14
2. A. 0
3. A. acid
4. D. acid and base