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Flashcards in Science - The Ph Scale Deck (11):
0

What is the pH scale?

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

1

What is neutralisation?

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

2

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

Universal indicator.

3

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

pH 7
Neutral

4

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

pH 2.8
Strong acid

5

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

pH 12.6
Strong Alkali.

6

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

pH 7.5 - 8.4
Very weak alkali

7

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

pH 1 - 2
Strong acid

8

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

pH 3.3
Acid

9

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

pH 6.9
Very weak acid

10

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

pH 2.5
Strong acid