Grade_8_Chemistry

After completing this unit you should be able to:

- explain the classification of compounds into organic and inorganic;

- know the formulas, names and importance of hydrocarbons;

- explain the classification of inorganic compounds into oxides, acids, bases and salts;

- know the properties, preparations and Uses of common oxides, acids, bases and salts;

- develop skills in identifying acidic, basic and neutral solutions;

- explain the safety precautions while working with acids and bases; and

- demonstrate scientific inquiry skills along this unit: observing, classifying, comparing and contrasting communicating, asking questions, designing experiment, drawing conclusion, applying concepts and problem solving. 

After completing this unit you should be able to:

- Know the general properties of metals.

- Explain the occurrence and uses of sodium, potassium, magnesium, calcium, aluminum, iron, copper, silver, gold, platinum, and tantalum.

- Recognize common and important ores of sodium, potassium, magnesium, calcium, aluminum, iron, copper, silver, gold, platinum, and tantalum:

- Describe some of the common properties of alloys and explain their Uses.

- Describe scientific enquiry skills along this unit: observing, comparing and contrasting, communicating, asking questions, drawing conclusions applying concepts, problem solving. 

After completing this unit you should be able to:

- Know the general properties of non-metals and how to differentiate non-metals from metals.

- Explain the occurrence and uses of carbon, nitrogen, phosphorus, oxygen and sulphur.

- Explain the uses of some common compounds of non-metals like carbon dioxide, sodium carbonate, nitric acid, phosphoric acid, calcium phosphate, sulphur dioxide and sulphuric acid.

- Describe scientific inquiry skills along this unit: observing, comparing and contrasting, communicating, asking questions, drawing conclusions, applying concepts, and problem solving.

After completing this unit you should be able to:

- Know the composition of air;

- Understand air pollution, causes of air pollution and effects of air pollutants;

- Understand global warming, causes and effects of global warming:

- Describe the hardness and softness of water; - Demonstrate the effect of hardness of water and describe the methods of softening of temporary and permanent hard water;

- Understand water pollution and water pollutants;

- Understand water purification;

- Describe the composition of soil and differentiate acidic, alkaline or neutral soils;

- Know the major plant nutrients, explain methods of improving soil fertility and suggest some methods of correcting soil acidity and alkalinity:

- Describe elemental composition of coal, natural gas and crude oil and explain their physical properties and Uses;

- Demonstrate scientific inquiry skills along this unit: observing, classifying, comparing and contrasting, communicating, asking questions, designing experiments, drawing conclusions, applying concepts and problem-solving.

After completing this unit you should be able to:

- Understand atomic mass, molecular mass, formula mass, the concept of mole, molar mass, percentage composition of compounds, empirical formula and molecular formula;

- Know how to determine molecular mass or formula mass from a given atomic mass of elements:

- Know how to determine percentage composition, empirical formula and molecular formula of a compound;

- Demonstrate scientific inquiry skills along this unit: observing, classifying, comparing and contrasting communicating, asking asking questions, designing experiments, drawing conclusions, applying concepts and problem-solving.