Chapter 4 Acids and redox

Question 1

What does a strong acid do in an aqueous solution?

Answer 1

Releases all its hydrogen atoms into solution as H+ ions and completely dissociates

Question 2

What does a weak acid do in an aqueous solution?

Answer 2

Releases a small proportion of its available hydrogen atoms into solution as H+ ions and partially dissociates

Question 3

What does a base do to an acid?

Answer 3

A base neutralises an acid to form a salt

Question 4

What is an alkali?

Answer 4

A base that dissolves in water releasing hydroxide ions into the solution

Question 5

What are the products from an Acid + Alkali?

Answer 5

Acid + Alkali –> Salt + Water

Question 6

What are the products from an Acid + Metal oxide?

Answer 6

Acid + Metal oxide –> Salt + Water

Question 7

What are the products from an Acid + Metal hydroxide?

Answer 7

Acid + Metal hydroxide –> Salt + Water

Question 8

What are the products from an Acid + Metal carbonate?

Answer 8

Acid + Metal carbonate –> Salt + Water

Question 9

What is titration?

Answer 9

A technique used to accurately measure the volume of one solution that reacts exactly with another solution

Question 10

What are 3 useful things that can be found out from titrations?

Answer 10

• Find the concentration of a solution
• Identification of unknown chemicals
• Finding the purity of a substance

Question 11

What is a volumetric flask used for?

Answer 11

Making up a standard solution very accurately

Question 12

What are concordant results?

Answer 12

Results within 0.10 of each other

Question 13

What is oxidation (In terms of electrons, oxygen and oxidation number)?

Answer 13

• Loss of electrons
• Addition of oxygen
• Increase in oxidation number

Question 14

What is reduction (In terms of electrons, oxygen and oxidation number)?

Answer 14

• Gain of electrons
• Removal of oxygen
• Decrease in oxidation number