Interactive Chemistry Worksheets for Students
Assumed perquisite knowledge:
Chemical changes indicate that something new has been produced. eg. The permanent color change produced as bread is toasted in a toaster or the smoke from a burning match.
The chemicals that react are called the reactants.
The new materials that are produced are called the products.
A chemical reaction can be shown by the use of a word equation. The means 'give or produce'
chemicals that react chemicals that are produced
1. Hydrogen + oxygen water
H 2 + O2 2H 2 O
2. Hydrogen peroxide water + oxygen
2H 2 O2 2H2O + O2
3. Magnesium + oxygen magnesium oxide
2Mg + O2 2MgO
4. Sodium chloride sodium + chlorine
2NaCl 2Na + Cl2