USES OF OXYGEN
Post Views: 4 Oxygen is put in cylinders for use where natural supply is not sufficiently enough. This is mainly in: (i) Mountain climbing/Mountaineering-at high altitudes, the concentration of air/oxygen… Read More »USES OF OXYGEN
Chemistry
REACTION OF METALS WITH OXYGEN/AIR
Post Views: 4 The following experiments show the reaction of metals with Oxygen and air. Burning Magnesium Procedure (a) Cut a 2cm length piece of magnesium ribbon. Using a pair… Read More »REACTION OF METALS WITH OXYGEN/AIR
OXYGEN
Post Views: 4 OXYGEN a) Occurrence. Fifty 50% of the earth’s crust consist of Oxygen combined with other elements e.g. oxides of metals About 70% of the earth is water… Read More »OXYGEN
THE ATMOSPHERE
Post Views: 12 THE ATMOSPHERE The atmosphere is made up of air. Air is a mixture of colourless, odourless gases which is felt as wind (air in motion). All living… Read More »THE ATMOSPHERE
INTRODUCTION TO ACIDS, BASES AND INDICATORS
Post Views: 3 . In a school laboratory: (i) An acid may be defined as a substance that turns litmus red. (ii) A base may be defined as a substance… Read More »INTRODUCTION TO ACIDS, BASES AND INDICATORS
PROPERTIES OF ACIDS
Post Views: 9 (A) PHYSICAL PROPERTIES OF ACIDS Acids have a characteristic sour taste Most acids are colourless liquids Mineral acids are odourless. Organic acids have characteristic smell All acids… Read More »PROPERTIES OF ACIDS
PHYSICAL/TEMPORARY AND CHEMICAL CHANGES
Post Views: 6 A physical/temporary change is one which no new substance is formed and is reversible back to original. A chemical/permanent change is one which a new substance is… Read More »PHYSICAL/TEMPORARY AND CHEMICAL CHANGES
METHODS OF SEPARATING MIXTURES
Post Views: 11 METHODS OF SEPARATING MIXTURES Mixtures can be separated from applying the following methods: (A) DECANTATION Sediments can be separated from a liquid by pouring out the liquid.… Read More »METHODS OF SEPARATING MIXTURES
CLASSIFICATION OF SUBSTANCES
Post Views: 13 CLASSIFICATION OF SUBSTANCES Substances are either pure or impure. A pure substance is one which contains only one substance. An impure substance is one which contains two… Read More »CLASSIFICATION OF SUBSTANCES
THE ROLE OF CHEMISTRY IN SOCIETY
Post Views: 7 (a) Chemistry is used in the following: (i) Washing/cleaning with soap: Washing/cleaning is a chemical process that involves interaction of water, soap and dirt so as to… Read More »THE ROLE OF CHEMISTRY IN SOCIETY
CHEMISTRY LABORATORY AND APPARATUS
Post Views: 6 CHEMISTRY LABORATORY AND APPARATUS Chemistry is studied mainly in a science room called a school chemistry laboratory. The room is better ventilated than normal classroom. It has… Read More »CHEMISTRY LABORATORY AND APPARATUS
WATER ON EARTH
Post Views: 5 WATER ON EARTH Water is an important item in our universe. We need water for transport (lakes and oceans), Generation of power, (hydroelectricity), drinking industrial processes, manufacturing… Read More »WATER ON EARTH
INTRODUCTION TO CHEMISTRY
Post Views: 5 INTRODUCTION TO CHEMISTRY Chemistry is a branch of Science. Science is basically the study of living and non-living things. The branch of science that study living things… Read More »INTRODUCTION TO CHEMISTRY
CHEMISTRY SS 3 SCHEME OF WORK
Post Views: 824 CHEMISTRY SCHEME OF WORK FOR SS 3 CHEMISTRY SS 3- FIRST TERM 1. Petroleum or Crude Oil 2. Metals and their Compounds 3. Iron 4. Quantitative and… Read More »CHEMISTRY SS 3 SCHEME OF WORK
CHEMISTRY SSS 2 SCHEME OF WORK
Post Views: 742 CHEMISTRY SS 2- FIRST TERM 1. Periodic Table 2. Chemical Reactions 3. Mass, Volume Relationships 4. Acid-Base Reactions 5. Water. CHEMISTRY SS 2- SECOND TERM 1. Air… Read More »CHEMISTRY SSS 2 SCHEME OF WORK
SCHEME OF WORK FOR CHEMISTRY SS 1
Post Views: 748 CHEMISTRY SS 1- FIRST TERM 1. Introduction to Chemistry 2. Particulate Nature of Matter 3. Symbols, Formulae and Equations 4. Chemical Combination 5. Gas Laws CHEMISTRY SS… Read More »SCHEME OF WORK FOR CHEMISTRY SS 1
OXYGEN (O2) PROPERTIES AND USES
Post Views: 624 OXYGEN (O2) PROPERTIES AND USES Oxygen (O2) is an active, life-sustaining component of the atmosphere; making up 20% by volume of the air we breathe. It is… Read More »OXYGEN (O2) PROPERTIES AND USES
RUSTING OF IRON
Post Views: 318 Corrosion The eating up of metals by the action of air and moisture on their surface is called corrosion. The corrosion of iron is called rusting. While… Read More »RUSTING OF IRON
WATER AND HYDROGEN
Post Views: 355 WATER AND HYDROGEN Hydrogen is the simplest element. It is the first element in the periodic table, and it is placed in Group I of the periodic… Read More »WATER AND HYDROGEN