Unit 1………………………………………………………………………….3
Unit 2 ………………………………………………………………………...10
Unit 3…………………………………………………………………………16
Unit 4………………………………………………………………………….22
Unit 5………………………………………………………………………….27
Unit 6………………………………………………………………………….32
Unit 7………………………………………………………………………….36
Unit 8…………………………………………………………………………..41
Unit 9…………………………………………………………………………..44
Unit 10………………………………………………………………………….50
Unit 11………………………………………………………………………….54
Unit 12……………………………………………………………………….....60
Unit 13………………………………………………………………………….65
Unit 14……………………………………………………………………….....71
Unit 15……………………………………………………………………….…77
Texts for additional reading……………………………………………………….83
Appendices ……………………………………………………………………...105
Literature………………………………………………………………………...125
Lesson 9. Keys to the exercises.
Ex. 3 Put the adjectives in brackets in Comparative. 1. more important
2 . more soluble
3. weaker
4. better
5. more
6. worse
7. more useful
Ex. 4 Put the adjectives in brackets in Superlative . 1. the most interesting
2. the best
3. the worst
4. the best-equipped
5. the best-known
6. the purest
7. the most acidic
Ex. 5 Put the adjectives in brackets in Superlative or Comparative 1. better
2. more
3. the cheapest
4. more
5. the quickest
6. the best
7. more easily –prepared
Ex. 6 Put the questions to the bold-typed words 1.
a.When did we discuss the Bronsted and Lowry theory at the lesson?
b. What did we discuss at the lesson yesterday?
c. Where did we discuss the Bronsted and Lowry theory?
2.
a. Who has done this experiment?
b. What have you done ?
3.
a. What is more soluble than a base?
b. What is acid more soluble ?
4.
a. What is the most soluble chemical?
5.
a. Who has proposed this method first?
b. What have you proposed first?
6.
a. What forms a covalent bond?
b. What bond does boron form?
7.
a. What happens faster in an acid than in a base?
b. How fast does the sharing of electrons happen in an acid (in a base)?
