18. Acids, bases and salts Questions and Answers
Acids, bases and salts Questions1. Study the reaction below and answer the questions that followNH3 (g) + H2O (l) NH4+ (aq) + OH–(aq) (a) Define
22. Metals Questions and Answers
Metals Questions1. The following diagram represents extraction of sodium by the Down’s cell (a) Why is the anode made of graphite in this case instead
4. Air and combustion Questions and Answers
Air and combustion Questions 1. The set-up below was used to prepare a sample of oxygen gas. Study it and answer the questions that follow.
23. Organic chemistry II (alkanoic acids and alkanols) Questions and Answers
Organic chemistry II (alkanoic acids and alkanols) Questions1. A student mixed equal volumes of Ethanol and butanoic acid. He added a few drops of concentrated
9. Salts Questions and Answers
Salts Questions1. Study the flow chart below and answer the questions that follow: a) Name reagent Z. b) Describe the process which takes
5. Water and hydrogen Questions and Answers
5. Water and hydrogen Questions1. (a) Hydrogen can reduce coppers Oxide but not alluminium oxide. Explain (b) When water reacts with potassium metal the
21. Electrochemistry Questions and Answers
Electrochemistry Questions1. The setup below was used to carry out the electrolysis of Magnesium sulphate solution using inert electrodes. (i) Name a suitable pair
20. Reaction rates and reversible reactions and Answers
Reaction rates and reversible reactions1. Study the following equilibrium reaction and answer the questions that follow:- HL(aq) + H2O(l) H3O+(aq) L–(aq) Given that
7. Chemical families Questions and Answers
Chemical families Questions1. Study the information in the table below and answer the questions that follow: Element Atomic radius (nm)Ionic radius (nm)W0.1140.195X0.0720.136Y0.1330.216Z0.0990.181 (a) Would these
16. Sulphur and its compounds Questions and Answers
Sulphur and its compounds Questions1. Sulphur is extracted from underground deposits by a process in which three concentric pipes are sunk down to the deposits
13. The mole Questions and Answers
The mole Questions1. In an experiment magnesium ribbon was heated in air. The product formed was found to be heavier than the original ribbon. Potassium
12. Gas laws Questions and Answers
Gas laws Questions1. A sample of unknown compound gas X is shown by analysis to contain Sulphur and Oxygen. The gas requires 28.3 seconds to
KCSE Chemistry Form Three Notes
· Chemistry Form 3 Notes : THE MOLE – Introduction to the mole, molar masses and Relative atomic masses· Chemistry Form 3: Gas laws· Chemistry
17. Chlorine and its compounds Questions and Answers
Chlorine and its compounds Questions1. (i) State one observation made in this experiment (ii) Identify the substances formed in the above reaction2. Hydrogen chloride
14. Organic chemistry 1 Questions and Answers
Organic chemistry 1 Questions1. Use the flow chart below to answer the questions that follow: (a) What observation would
2. Simple classification of substances Questions and Answers
Simple classification of substances Questions1. The diagram below shows the heating curve of a pure substance. Study it and answer the questions that follow: