Balancing equations homework

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Presentation transcript:

Balancing equations homework

Chemical Equations 2Na 2H2O 2NaOH 2Na(s) 2NaOH(aq) 2H2O(l) Step 1: Write down the word equation. Step 2: Replace words with the chemical formula . Step 3: Check that there are equal numbers of each type of atom on both sides of the equation. If not, then balance the equation by using more than one. Step 4: Write in the state symbols (s), (l), (g), (aq). Reactants Products sodium + water  hydrogen + sodium hydroxide + Na H2O H2 NaOH Hydrogen doesn’t balance. Use 2 H2O, NaOH, 2Na 2Na 2H2O H2 2NaOH 2Na(s) 2H2O(l) 2NaOH(aq) H2(g)

Chemical Equations Step 1: Write down the word equation. Step 2: Replace words with the chemical formula . Step 3: Check that there are equal numbers of each type of atom on both sides of the equation. If not, then balance the equation by using more than one. Step 4: Write in the state symbols (s), (l), (g), (aq). Reactants Products magnesium + lead nitrate  magnesium nitrate + lead + Mg Pb(NO3)2 Mg(NO3)2 Pb Already balances. Just add state symbols Mg(s) Pb(NO3)2(aq) Mg(NO3)2(aq) Pb(s)