Quiz 1 Half Chapter 4

Quiz 1st Half Chapter 4
Section I. Fill in the blank (1 point per blank)
1. When a _______________ is dissolved in water, the water
conducts electricity much more easily.
2. Name two different classes of strong electrolytes____________,
and _________________.
3. Balance the following chemical equations
A. (2 points) C12H22O11(s) + O2(g) 6 CO2(g) + H2O(g)
B. (2 points) Ca(s) + H2O(l) 6 Ca(OH) 2(aq) + H2(g)
4. In my class demonstration I reacted 20 g of solid ammonium
dichromate in the reaction:
(NH4)2Cr2O7(s) 6 Cr2O3(s) + N2 + 4H2O
A. (3 points) How many grams of Cr 2O3 were created in this reaction?
B. (3 points) How many grams of water were created?
C. (3 points) If the reaction only liberates 5.0 grams of water, what
was my percent yield for the reaction?
5. In the reaction 2H2(g) + O2(g) 6 H2O(g)
A. (1 point) Which is the limiting reagent if I have 0.16 mol of H2 and
0.14 mol of O2?
B. (3 points) Which is the limiting reagent if I have 0.16 g of H2 and
0.14 g of O2?