Quiz 8 practice                         CHEM 20                      Name___________________

Activity Series K, Ca, Na, Mg, Al, Zn, Fe, Ni, Sn, Pb, H, Cu, Ag, Hg, Au

                         Most Active                                               Least Active

1 Write the balanced chemical equation for the following word equations. Be sure that each formula is correct.

Calcium bromide + Sulfurous acid goes to give Calcium sulfite + Hydrobromic acid

a)

Phosphoric acid + Aluminum goes to give Aluminum phosphate + Hydrogen

b)

          Sodium hydroxide + perchloric acid goes to give Sodium perchlorate + water c)

2 Complete and balance the following equations.

a) Na + Br2 --->

b) H2SO3 + Mg(HCO3)2 --->

c) CaCO3 ---->

d) CaCl2 + Na2SO4 --->

e) Cu + Pb(C2H3O2) ---->

           f) CaO + H2O ---> g) Zn + H3PO4 ---->

3 Fill in the blanks.

The above graph is for a _______________ (endothermic, exothermic) reaction.

4     The photosynthesis reaction is shown below:

6CO2 + 6H2O + 2519 kJ ---> C6H12O6 + 6O2

a) Is the reaction endothermic or exothermic?

b) How much sunlignt energy is required to make 450 moles of sugar (C6H12O6)?