chemistry 2

Project Description:

1. label each of the following as soluble or insoluble in water.

a. agcl__________________

b. lino3 __________________

c. pbso4__________________

d. k3po4 __________________

2. write the complete ionic and net ionic equations for the following reaction/

pb(no3)2 (aq) + 2 kbr (aq)  pbbr2 (s) + 2 kno3 (aq)

3. identify the following types of reactions as precipitation, acid/base neutralization or oxidation reduction

a. hcl(aq) + naoh(aq) h2o (l) + nacl(aq) ____________________

b.pb(no3) (aq) + kcl (aq)  pbbr2 (s) + kno3 (aq) ___________________

c. ch4 (g) + o2 (g)  co2 (g) + h2o (g) ___________________

4. why is water called “the universal solvent”?

5. consider what happens when10 ml of 0.10 m hcl and 20 ml of 0.06 m naoh are combined.

a. write a balanced chemical equation for this neutralization reaction.

b. which will remain in excess, hcl or naoh? what is the concentration, in molarity, of the remaining acid or base after mixing?

6. what is the δh value for the reverse reaction of the following reaction:

co2 (g) + 2h2o (l)  ch4 (g) + o2 (g) δhforward = +890 kj

a. + 445 kj
b. – 445 kj
c. + 890 kj
d. – 890 kj

7. a piece of copper weighs 125 g. if 1.33 x 104 j heat is needed to raise the temperature of the copper from 25 c to 300 c, what is the specific heat, c, of copper?

a. 133.0 j/(g*k)
b. 387.0 j/(g*k)
c. 0.387 j/(g*k)
d. 1330.0 j/(g*k)

8. calculate the δh for the following reaction:

co (g) + 2 h2 (g)  ch3oh (g)

using hess’s law and the following reactions:

2c (s) + o2(g)  2co (g) δh = - 221.0 kj
2c (s) + o2 (g) + 4h2 (g)  2ch3oh (g) δh = -402.4 kj

9. what did rutherford’s “gold foil” experiment show?

a. electrons are embedded in a positive sphere
b. electrons are much bigger than protons
c. the volume of an atom is mostly empty space
d. all of the above
e. none of the above

10. which of the following is a “d-block” element?

a. sodium
b. carbon
c. argon
d. iron

11. give the electron configurations for the following elements

a. c _____________________

b. o ______________________

c. ne _____________________

12. which of the following elements has the largest atomic radius?

a. na
b. ba
c. pb
d. cl
e. ar

13. which of the following elements has the smallest atomic radius?

a. na
b. ba
c. pb
d. cl
e. ar

14. which of the following elements has the highest electronegativity?

a. p
b. ba
c. pb
d. f
e. mg

15. which of the following elements has the smallest ionization energy?

a. na
b. ba
c. fr
d. cl
e. la
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