Metals combine with other substances to form compounds. There is a diversity of metal compounds known. One can make an endless list of the compounds of the metals. In this chapter, we are going to concentrate our efforts on the
Occurrence and Location of Metals in Tanzania Identify locations of important metal ores in Tanzania Most metals are found naturally as compounds called minerals. Rocks are made up of crystals of metals. An ore is a rock that contains enough of
The Rate of Chemical Reactions Comparison between the Rates of Chemical Reactions Compare the rates of chemical reactions Chemical reactions take place at different rates. Some are fast whereas others are very slow. Let us consider the following reactions: These
Ionic Theory To account for the phenomena of electrolysis the Ionic Theory was put forward by Arrhenius in 1880. The theory states that electrolytes are made up of ions, which are built up in certain patterns called crystal lattice. When
Standard Volumetric Apparatus Explain the concept of volumetric analysis Volumetric analysis is a quantitative analysis involving the measurement of different solutions. These solutions are made to react completely and the completion of the reaction is indicated by certain substances called indicators.
The Mole with Other Units of Measurements Compare the mole with other units of measurements When carrying out an experiment, a chemist cannot weigh out a single atom, ion, electron, proton or molecule of a substance. These particles are simply
The Natural Sources of Acids and Bases Investigate the natural sources of acids and bases In everyday life, we deal with many substances that chemists classify as acids. For example, orange juice and grapefruit juice contain citric acid. These juices,
The Concept of Hardness of Water Explain the concept of hardness of water As water flows over the land, it dissolves many mineral substances. The dissolved minerals are deposited together with water in rivers, lakes and oceans. Water is said
A chemical equation is a representation of a chemical reaction with the help of symbols and formulae of the substances involved in the reaction. It is a chemical shorthand for representing the reacting substance or substances combining (the reactants) and
The Occurrence and Nature of Water Describe the occurrence and nature of water Water is the most abundant liquid in nature. It is a compound of hydrogen and oxygen. It occurs on land as seas, oceans, rivers, springs, wells, etc.
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