Chemistry

INDICATORS

INDICATORS Red cabbage juice solution works well instead of universal indicator solution. Making Cabbage Indicator Acid base indicators are chemicals that change colour in the presence of different pH… Read More »INDICATORS

COMPOUNDS AND FORMULA

COMPOUNDS AND FORMULA A compound is a pure substance formed by chemically combining at least two different elements. Compounds are two or more different elements combined. Their atoms have been… Read More »COMPOUNDS AND FORMULA

SEPARATION OF MIXTURES

SEPARATION OF MIXTURES Sometimes we need pure substances as opposed to impure ones. You can imagine a mixture of sand and table salt and imagine how much use you would… Read More »SEPARATION OF MIXTURES

DISTINCTION BETWEEN COMPOUNDS AND MIXTURES

DISTINCTION BETWEEN COMPOUNDS AND MIXTURES The following example of iron, sulphur and iron sulphide will make us understand the difference between mixtures and compounds. Properties of Iron and Sulphur… Read More »DISTINCTION BETWEEN COMPOUNDS AND MIXTURES

CONSTITUENTS OF MATTER

CONSTITUENTS OF MATTER Atoms, Molecules, Elements and Compounds The Atom An atom is the smallest particle of a substance which can have its own characteristic properties. Atoms are built up of… Read More »CONSTITUENTS OF MATTER

CONDUCTORS AND INSULATORS

CONDUCTORS AND INSULATORS The ability to conduct electricity is the major simple distinction between elements that are metals and non-metals. Electrical Conductors A conductor is a material that conducts… Read More »CONDUCTORS AND INSULATORS

CLASSIFICATION OF SUBSTANCES

Pure Substance Pure means that only one substance is present in the material and can be a pure element or compound. A simple physical test for purity, and properties that… Read More »CLASSIFICATION OF SUBSTANCES

CONDUCTORS AND NON-CONDUCTORS

CONDUCTORS AND NON-CONDUCTORS All metals (copper, iron, lead, magnesium etc) and graphite, a non-metal. Most non-metals (sulphur, iodine, charcoal etc.) Most solid compounds (All gases are non-conductors) Liquids are… Read More »CONDUCTORS AND NON-CONDUCTORS

COMPOUNDS AND THEIR PROPORTIONS

COMPOUNDS AND THEIR PROPORTIONS All elements are represented by a chemical symbol. It is either a single capital letter, or a capital letter followed by a small letter. Examples: Ca… Read More »COMPOUNDS AND THEIR PROPORTIONS

MATTER

MATTER Matter is: Anything that has mass and occupies space (has volume) Composed of particles (molecules, ions, atoms). These are in constant motion attracting one another with inter-particle forces (or… Read More »MATTER

SIMPLE CLASSIFICATION OF SUBSTANCES

CLASSIFICATION OF SUBSTANCES Matter Matter can be classified as either a mixture or a pure substance. Mixtures contain at least two substances. If you can see the different parts of… Read More »SIMPLE CLASSIFICATION OF SUBSTANCES

NAMES OF LABORATORY APPARATUS

Which apparatus? You wouldn’t dream of trying a chicken using a spoon, or of drying your hair in over a stove! In everyday life, we need to use the right… Read More »NAMES OF LABORATORY APPARATUS

SCIENTIFIC METHOD

SCIENTIFIC METHOD The scientific method is a set of ideas or a procedure that scientists use to investigate things they want to understand. By using the method, you can be… Read More »SCIENTIFIC METHOD

CHEMISTRY LABORATORY

Safety rules and regulations Your school science laboratory is set up so that you can perform science experiments in safety provided that you follow the proper procedures and safety precautions… Read More »CHEMISTRY LABORATORY

INTRODUCTION TO CHEMISTRY

INTRODUCTION TO CHEMISTRY Welcome to Chemistry, the Science concerned with the study of matter. In simplest terms, chemistry is the science of matter. Anything that can be touched, tasted, smelled,… Read More »INTRODUCTION TO CHEMISTRY

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