Acids and Alkalis

Question 1

define acid

Answer 1

a substance which produces hydrogen ions when it is dissolved in water

Question 2

define alkali

Answer 2

a substance which produces hydroxide ions when it is dissolved in water

Question 3

list the properties of an acid

Answer 3

1. sour taste
2. corrosive
3. turns blue litmus paper red
4. remains red litmus paper red
5. turns methyl orange red
6. remains phenolphthalein colourless

Question 4

list the properties of an alkali

Answer 4

1. bitter taste
2. soapy feel
3. remains blue litmus paper blue
4. turns red litmus paper blue
5. turns methyl orange yellow
6. turns phenolphthalein pink

Question 5

list common acids & chemical formula

Answer 5

1. hydrochloric acid // HCL
2. sulfuric acid // H₂SO₄
3. nitric acid // HNO₃

Question 6

list common alkalis & chemical formula

Answer 6

1. potassium hydroxide // KOH
2. sodium hydroxide // NaOH
3. aqueous ammonia // NH₃ (aq)