C2 5.2

Question 1

Which indicators can tell us the pH of a solution?

Answer 1

Universal indicator and full range indicators

Question 2

What is an alkali?

Answer 2

A soluble base or a substance that produces hydroxide ions in solution

Question 3

Acid + base —> Salt + ……….

Answer 3

Acid + base —> Salt + Water

Question 4

…….. + metal oxide —> Salt + water

Answer 4

Acid + metal oxide —> Salt + water

Question 5

Roughly what colour and pH is a strong alkali?

Answer 5

Dark purple, pH 14

Question 6

What is the general equation that describes a neutralisation reaction?

Answer 6

Acid + base —> salt + water

Question 7

What salts are formed when we neutralise hydrochloric acid?

Answer 7

Chlorides

Question 8

What salts are formed when we neutralise nitric acid?

Answer 8

Nitrates

Question 9

What salts are formed when we neutralise sulphuric acid?

Answer 9

Sulfates

Question 10

The reaction between an acid and a base is called a ………….. reaction

Answer 10

The reaction between an acid and a base is called a neutralisation reaction

Question 11

What pH is neutral?

Answer 11

pH 7

Question 12

What pH is a strong acid?

Answer 12

pH 1

Question 13

What pH range are all acids?

Answer 13

pH 1-6

Question 14

What pH range are all alkalis?

Answer 14

pH 8-14

Question 15

What pH is baking soda?

Answer 15

pH 8 so it is a weak alkali

Question 16

What pH is oven cleaner?

Answer 16

pH 14 so it is a strong alkali

Question 17

What pH is vinegar?

Answer 17

pH 3 so it is an acid

Question 18

Acid + metal —> ……+ …………..

Answer 18

Acid + metal ——-> salt + Hydrogen

Question 19

What is the symbol equation for

Hydrochloric acid + magnesium —-> magnesium chloride + hydrogen

Answer 19

2HCl + Mg —> MgCl(2) + H(2)

(2) means the tiny 2

Question 20

Give the word equation for this reaction
6HCl + Fe(2)O(3) —> 2FeCl(3) + 3H(2)O

(2) `means the little 2 like in water (H2O)

Answer 20

Hydrochloric acid + solid iron (iii) oxide —> Iron (iii) chloride solution + water