18.5 CHAPTER 18. REACTIONS IN AQUEOUS SOLUTION
- A redox reaction is one in which electrons are transferred from one substance to
another.
Chapter 18 End of chapter exercises
1. Give one word for each of the following descriptions:
a. the change in phase of water from a gas to a liquid
b. a charged atom
c. a term used to describe the mineral content of water
d. a gas that forms sulphuric acid when it reacts with water
2. Match the information in column A with the information in column B by
writing only the letter (A to I) next to the question number (1 to 7)Column A Column B- A polar molecule A. H 2 SO 4
- Molecular solution B. CaCO 3
- Mineral that increases water hardness C. NaOH
- Substance that increases the hydrogen ion concentration D. salt water
- A strong electrolyte E. calcium
- A white precipitate F. carbon dioxide
- A non-conductor of electricity G. potassium nitrate
H. sugar water
I. O 2
3. Explain the difference between a weak electrolyte and a strong electrolyte.
Give a generalised equation for each.4. What factors affect the conductivity of water? How do each of these affect
the conductivity?5. For each of the following substances state whether they are molecular or
ionic. If they are ionic, give a balanced reaction for the dissociation in
water.
a. methane (CH 4 )
b. potassium bromide330 Chemistry: Chemical change