Lecture 8 Notes - Lecture 8 Notes Writing chemical...

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Lecture 8 Notes Writing chemical equations o Write equation in word and identify state of chemicals 1 solid Magnesium atom reacts with 1 gaseous oxygen molecule to produce 1 Magnesium oxide molecule o Write equation in formula form Identify diatomic elements Identify polyatomic elements Determine formulas + Mgs O2g MgOs o In a chemical reaction: matter cannot be created or destroyed Meaning 10kg of reactant 10kg of products o Use proper formulas for each reactant and product Mg(s) + O(g) MgO(s) O: 2 O:1 O:2*1 O:1*2 Mg(s) + O 2 2MgO(s) Mg:1 Mg:2 Mg:1*2 Mg:2*1 2Mg(s) + O 2 (g): 2MgO(s) Balancing by inspection-basic principles: o Count atoms of each element Polyatomic ions are 1 unit if they are unchanged in the reaction Al + FeSO 4 Al 2 (SO 4 ) 3 + Fe 2Al + 3FeSO 4 Al 2 (SO 4 ) 3 + 3Fe If an element is in more than 1 compound:
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CO + O 2 CO 2 2CO + O 2CO 2 o Pick an element to balance
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Lecture 8 Notes - Lecture 8 Notes Writing chemical...

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