Science - The Ph Scale

Question 0

What is neutralisation?

Answer 0

When an acid and alkali of the same strength mix together they undergo a chemical reaction to form a neutral substance. pH 7

Question 1

What is the pH scale?

Answer 1

A series of numbers from 1 to 14 that indicates the strength of
Strong acid
Weak acid
Neutral
Weak alkali
Strong alkali

Question 2

What can we use to test if a substance is an acid or an alkali?

Answer 2

Universal indicator.

Question 3

What is the pH of water? Is it an acid/alkali/neutral?

Answer 3

pH 7

Neutral

Question 4

What is the pH of citric acid? Is it an acid/alkali/neutral?

Answer 4

pH 2.8

Strong acid

Question 5

What is the pH of bleach? Is it an acid/alkali/neutral?

Answer 5

pH 12.6

Strong Alkali.

Question 6

What is the pH of salt water? Is it an acid/alkali/neutral?

Answer 6

pH 7.5 - 8.4

Very weak alkali

Question 7

What is the pH of hydrochloric acid? Is it an acid/alkali/neutral?

Answer 7

pH 1 - 2

Strong acid

Question 8

What is the pH of an acid? Is it an acid/alkali/neutral?

Answer 8

pH 3.3

Acid

Question 9

What is the pH of hand soap? Is it an acid/alkali/neutral?

Answer 9

pH 6.9

Very weak acid

Question 10

What is the pH of vinagar? Is it an acid/alkali/neutral?

Answer 10

pH 2.5

Strong acid