Investigating the action of heat on copper sulphate Diagram Method: A clean, dry boiling tube is weighed. About 20g of copper sulphate is placed in the tube which is then weighed again. The apparatus is now set up as shown … Continue reading →
(The experiment described below can also be done using chopped up copper foil instead of magnesium, but because copper does produce smoke when heated the crucible lid is not needed) Experiment to see if magnesium changes in mass when heated … Continue reading →
Sometimes called the Reactivity series Reactions with carbon Displacement reactions A list of elements (usually metals) arranged in an order to show how easily they form compounds. Some elements arranged in order of chemical activity. The rate of chemical reactivity … Continue reading →
A chemical reaction ALWAYS forms a new substance. Signs that show a chemical reaction has taken place are: i. A change in colour ii. A change in temperature (usually gets hot) Types of reaction Burning Decomposition Oxidation and reduction Neutralization … Continue reading →
Elements, compounds and mixtures Elements in the Earth’s crust Obtaining metals from their ores There are about 100 elements in total, although only about 20 are in everyday use. An element is the simplest of all chemical substances. It … Continue reading →
Acids Alkalis Neutral liquids The PH scale Indicators Neutralization Reactions involving acids ACIDS (acidic solutions) Acids have the following properties: Have a pH value less than pH 7 Turn blue litmus indicator red Can neutralise an alkali Have a sour … Continue reading →
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