Balancing Practice Quiz Name_________________________ Period________Date_____________ Complete each of the following with the word or words which best finishes the sentence. 1. A chemical equation will show ____________________on the left side and ___________________ on the right side. A(n) _________________ is written between the two sides. 2. A(n) ________ will be written next to any substances in the equation which are gases. 3. _________________________ are placed BEFORE formulas to balance the equation. 4. _________________________ are placed IN the formula and indicate the number of atoms of a particular element in a molecule. 5. Aqueous or “(aq)” means ____________________________________________________________. 6. A(n) ________ will be written next to any substances in the equation which are solids or precipitates. Balance the following by placing numbers in the appropriate blanks. Some spaces may be left blank. ______O2 ______Fe3O4 ______AgNO3 + ______H2S ______Ag2S + ______HNO3 ______Al(NO3)3 + ______K2CO3 ______Al2(CO3)3 + ______KNO3 ______Ir2O3 7. ______Fe 8. 9. + 10. ______IrCl3 + ______NaOH 11. ______NH3 + ______O2 ______N2O4 + ______HCl + + ______NaCl ______H2O Challenging: + ______H3PO4 12. ______Mg(OH)2 ______Mg3(PO4)2 + ______H2O 13. ______MoO3 + _____Zn + _____H2SO4 _____Mo2O3 + _____ZnSO4 + _____H2O Writing & Balancing Word Equations Use the Ion List and Periodic Table to correctly write the formulas and then balance the following word equations. 1. sodium chlorate (cr) sodium chloride (cr) 2. silver (s) + sulfur (cr) 3. iron (s) + copper (II) nitrate (aq) + oxygen (g) silver sulfide (cr) iron (III) nitrate (aq) + copper (s) 4. barium hypochlorite (aq) + potassium sulfate (aq) potassium hypochlorite (aq) + barium sulfate (s) 5. Hexane, C6H14, burns in a combustion reaction in oxygen to form carbon dioxide and water.