1. Balancing Chemistry RXN

2. MAKING SENSE OF CHEMICAL EQUATIONS Communication is an important word in today's world. One way chemists can communicate with information about a reaction is by writing a chemical equation. Chemical equations form an international language. Chemists from different countries can communicate with each other by equations.Communication is an important word in today's world. One way chemists can communicate with information about a reaction is by writing a chemical equation. Chemical equations form an international language. Chemists from different countries can communicate with each other by equations.

3. What does an equation show? It describes a real event.It describes a real event. It tells you which chemicals are reacting.It tells you which chemicals are reacting. It uses a chemical shorthand to describe a reaction. (symbols and formulae)It uses a chemical shorthand to describe a reaction. (symbols and formulae) It tells you how many particles are involved. (atoms, molecules and ions)It tells you how many particles are involved. (atoms, molecules and ions)

4. What does an equation show? It tells you the number of moles of each substance that react together.It tells you the number of moles of each substance that react together. It tells you the number of moles of products formed. (These are the large numbers in front of the formulae)It tells you the number of moles of products formed. (These are the large numbers in front of the formulae) Many equations also show whether a substance is a solid, liquid or gas or dissolved in water. (state symbols, (s), (l), (g), or (aq).Many equations also show whether a substance is a solid, liquid or gas or dissolved in water. (state symbols, (s), (l), (g), or (aq).

5. WRITING CHEMICAL EQUATIONS Write the equation in words. Make sure you include all the reactants and all the products.Write the equation in words. Make sure you include all the reactants and all the products. Now write the equation in symbols, making sure you have used the correct formula for each substance.Now write the equation in symbols, making sure you have used the correct formula for each substance. Remember that the common gases are diatomic. ( they exist as pairs)Remember that the common gases are diatomic. ( they exist as pairs) Check the formula of each compound and do not alter the small numbers that are part of the formula.Check the formula of each compound and do not alter the small numbers that are part of the formula. If you cannot remember the correct formula, you will have to work it out by the methods shown in the Chemical Formula Worksheet.If you cannot remember the correct formula, you will have to work it out by the methods shown in the Chemical Formula Worksheet.