Supplemental Instruction
IowaStateUniversity / Leader: / Ryan
Course: / Chem 177
Instructor: / Miller/Bonaccorsi
Date: / 9/18/12
1.)When a mixture of 10.0 g of acetylene (C2H2) and 10.0 g of oxygen is ignited, the reaction is a combustion reaction. (C=12.0 g/mol, H=1.01 g/mol, O=16.0 g/mol)
a.)Write the balanced chemical equation for this reaction.
b.)Which is the limiting reactant?
c.)How many grams of C2H2, O2, CO2, and H2O are present after the reaction is complete?
2.)Aspirin (C9H8O4) is produced from salicylic acid (C7H6O3) and acetic anhydride (C4H6O3):
3.)C7H6O3 + C4H6O3 → C9H8O4 + HC2H3O2
a.)How much salicylic acid is required to produce 1.5 x 102 kg of aspirin, assuming that all the salicylic acid is converted to aspirin?
b.)How much salicylic acid would be required if only 80% of the salicylic acid is converted to aspirin?
c.)What is the theoretical yield of aspirin if 185 kg of salicylic acid is allowed to react with 125 kg of acetic anhydride?
d.)If the situation described in part c.) produces 182 kg of aspirin what is the percent yield?
4.) Name and write the formula for the seven strong acids
5.)Using Table 4.1, the Solubility Table on page 121, classify these ionic compounds as soluble or insoluble in water:
a.)Sodium Carbonate
b.)Lead sulfate
c.)Cobalt(II) hydroxide
d.)Barium nitrate
e.)Ammonium phosphate
6.)Predict the products, balance the chemical equation, write out the complete ionic equation, followed by any spectator ions, and finally write the net ionic equation:
a.)AgNO3(aq) + KCl(aq) →
Complete Ionic Equation:
Spectators:
Net ionic Equation:
b.)Write the net ionic equation for the precipitation reaction that occurs when aqueous solutions of silver nitrate and potassium phosphate are mixed.