Chemical reactions and equations
- 4. A chemical equation represents a chemical reaction. If you recall formulae of magnesium, oxygen and magnesium oxide, the above word-equation can be written as Mg + O2 MgO
- 5. A WORD EQUATION describes chemical change using the names of the reactants and products. Write the word equation for the reaction of methane gas with oxygen gas to form carbon dioxide and water.
- 10. According to the law of conservation of mass, total mass must be equal on the both sides of the equation. This type of equation is known as a balanced chemical reaction. E.g.- 2Mg + O2 2MgO Here both sides have two atoms of Magnesium and two atoms of Oxygen.
- 11. 2 Na2 Na ++ ClCl22 2NaCl2NaCl