module two: chapter four: acids and redox

Question 1

what is a strong acid?

Answer 1

releases all of its hydrogen atoms into an aqueous solution and completely dissociates

Question 2

what is a weak acid?

Answer 2

only releases a small proportion of its available hydrogen atoms into an aqueous solution and partially dissociates

Question 3

what is a base?

Answer 3

neutralises an acid to form a salt

Question 4

what is an alkali?

Answer 4

a base that dissolves in water releasing hydroxide ions

Question 5

what is formed when an acid is neutralised by a metal oxide or metal hydroxide?

Answer 5

salt and water only

Question 6

what is formed when an acid is neutralised by an alkali?

Answer 6

salt and water only

Question 7

what is formed when an acid is neutralised by a carbonate?

Answer 7

salt, water and carbon dioxide

Question 8

what is the oxidation number of O?

Answer 8

-2

Question 9

what is the oxidation number of H?

Answer 9

+1

Question 10

what is the oxidation number of F?

Answer 10

-1

Question 11

what is the oxidation number of Na+ or K+?

Answer 11

+1

Question 12

what is the oxidation number of Mg2+ or Ca2+?

Answer 12

+2

Question 13

what is the oxidation number of Cl- or Br- or I-?

Answer 13

-1

Question 14

reduction?

Answer 14

gain of electrons

Question 15

oxidation?

Answer 15

loss of electrons