Problem Set 6 Answer Key (PDF)

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Chemistry Lesson: Steemit Edition Problem Set 6

1.) What type of reactions are the following (Acid-Base/Precipitation/Redox)?
a. 4 Fe (s) + 3 O2 (g) -> 2Fe2O3 (s)
Redox Reaction (This is the formation of rust)
b. HCl (aq) + NaOH (aq) -> H2O (l) + NaCl (aq)
Acid-Base Reaction (Hydrochloric Acid and Sodium Hydroxide react to form Water and
Sodium Chloride)
c. BaCl2 (aq) + Na2(SO4) (aq) -> Ba(SO4) (s) + 2 NaCl (aq)
Precipitation Reaction (Formation of insoluble Barium Sulfate precipitate)
d. HNO3 (aq) + H2PO4- -> H3PO4 + NO3Acid Base Reaction (Nitric Acid reacts with DiHydrogen Phosphate to form Phosphoric
Acid and a Nitrate ion)

2.) Assign oxidation numbers to the following compounds
a. Sr(ClO4)2
Sr (+2), Cl (+7), O(-2)
b. MgCl2
Mg (+2), Cl (-1)
c. Ba(OH)2
Ba (+2), O (-2), H(+1)
d. Fe2O3
Fe(+3), O(-2)

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