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Balancing Chemistry RXN

Balancing Chemistry RXN. MAKING SENSE OF CHEMICAL EQUATIONS.

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Balancing Chemistry RXN

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  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.

  3. What does an equation show? • It describes a real event. • It tells you which chemicals are reacting. • It uses a chemical shorthand to describe a reaction. (symbols and formulae) • 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 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).

  5. WRITING CHEMICAL EQUATIONS • 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. • 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. • If you cannot remember the correct formula, you will have to work it out by the methods shown in the Chemical Formula Worksheet.

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