Assignment:
Q1. Which ion(s) is/are spectator ions in the formation of a precipitate of AgBr via combining aqueous solutions of CoBr2 and AgNO3?
a. Co2+ and Ag+
b. Co2+ and NO3-
c. NO3- and Br-
d. NO3-
e. Br-
Q2. Which of the following is an exchange reaction?
a. 2SO(g) + O2(g) ---> 2SO2(g)
b. CaCO3(s) ---> CaO(s) + CO2(g)
c. Fe(s) + Ni(NO3)2(aq) ---> Fe(NO3)2(aq) + Ni(s)
d. HCl(aq) + NaOH(aq) ---> H2O(l) + NaCl(aq)
e. CH4(g) + 2O2(g) ---> CO2(g) + 2H2O(l)
Q3. Which of the following are strong acids?
HI
HNO3
HF
HBr
a. 2, 3, & 4
b. 1, 2, & 4
c. 1, 2, 3, & 4
d. 3 & 4
e. 1, 3, & 4
Q4. Which hydroxides are weak bases?
Sr(OH)2
KOH
NaOH
Ba(OH)2
a. 1, 2, 3, & 4
b. 2 & 4
c. 2, 3, & 4
d. 2 & 3
e. none of these is a weak base
Q5. Consider the following reactions:
AgNO3(aq) + Zn(s) ---> Ag(s) +Zn(NO3)2
Co(NO3)2(aq) + Zn(s) ---> no reaction
AgNO3 + Co(s) ---> Co(NO3)2(aq) + Ag(s)
Q6. Which is the correct order of increasing (from least to most reactive) activity for these metals?
a. Co < Zn < Ag
b. Co < Ag < Zn
c. Ag < Co < Zn
d. Zn < Co < Ag
e. Ag < Zn < Co