pH Scale And Acids

Question 1

What is neutral on pH scale and what colour does it turn universal indicator?

Answer 1

7 + green

Question 2

What’s a base?

Answer 2

A substance With a pH above 7, so an alkali

Question 3

Define acid

Answer 3

A substance with a pH below 7 and forms H+ ions

Question 4

Define alkali

Answer 4

A substance with pH above 7 that forms OH- ions

Question 5

What’s the equation for a neutralisation?

Answer 5

OH- + H+ -> H2O

Question 6

Base + acid reaction is called?

Answer 6

Neutralisation

Question 7

What’s the difference between a strong and weak acid

Answer 7

Strong is fully ionised in an aqueous solution but weak is partially

Question 8

What does hydrochloric acid form in a salt

Answer 8

Chloride

Question 9

What does sulphuric acid turn into in a salt?

Answer 9

Sulphate

Question 10

What does nitric acid turn into in a salt?

Answer 10

Nitrate

Question 11

What does phosphoric acid turn into in a salt?

Answer 11

Phosphate

Question 12

Reaction between metal and acid. Products?

Answer 12

Salt and hydrogen

Question 13

Reaction between metal oxide and acid. Products?

Answer 13

Salt + water

Question 14

Acid and hydroxide react. Products?

Answer 14

Salt and water

Question 15

Metal carbonate + acid react. Products?

Answer 15

Salt + water + co2