Ex.2 Answer the questions. 1. What is acid?
2. How many categories of acids exist?
3. Why did Bronsted and Lowry generalize the Arrhenius theory?
4. What substances are called acidic?
5. What do common acids include?
Ex. 3 Put the adjectives in brackets in Comparative. 1. This acid theory is (important) ____ than that theory.
2. Ammonia is (soluble) ___ than nitrogen.
3. Nitric acid is (weak) ___ than sulphuric acid.
4. I understand the Arrhenius theory (good) ____ than Bronsted and Lowry theory.
5. I know about Bronsted and Lowry theory (much) ___ than my friend.
6. She knows acid theories (bad) ___ than her sister.
7. Arrhenius acids have (useful) ____ properties than Bronsted acids.
Ex. 4 Put the adjectives in brackets in Superlative . 1. Bronsted theory is (interesting) theory.
2. Which acid is (good) ___?
3. Nitric acid is (bad) ___ solvent.
4. This laboratory is (well-equipped) ___ laboratory in the university.
5. This property is (well-known) ____ of all physical properties.
6. Hydrochloric acid is (pure) ____ substance of all acidic substance.
7. This chemical is (acidic) ____ of all other chemicals.
Ex. 5 Put the adjectives in brackets in Superlative or Comparative 1. Who knows Bronsted theory (good) ____ than me.
2. Yesterday I obtained (many) ____ compounds than usually.
3. It is (cheap) ___ method to prepare sulphuric acid.
4. Boron trifluoride has (many) ____ vacant orbitals than other chemical compound.
5. What is (quick) ____ way to produce large quantities of sulphuric acid?
6. Who is ready to propose (good) ___ decision to solve this problem?
7. What is (an easily –prepared) ____substance, boric acid or hydrochloric acid?
Ex. 6 Put the questions to the bold-typed words 1. Yesterday we discussed the Bronsted and Lowry theory at the lesson. 2. I have done this experiment.
3. Acid is more soluble than a base.
4. Acid is the most soluble chemical.
5. I have proposed this method first.
6. Boron forms a covalent bond.
7. The sharing of electrons happens faster in an acid than in a base.
