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tm2000 · 05-12-2005, 03:24 PM

Ok well on number 1, i don't remember my answers. However, I know methanoic acid was stronger.

I did number 3: Here's a BIG question I have here. For the value of the rate constant, i put 610. I know, when you test the 1 reaction, you get about 611.7. HOWEVER, because of sig figs, i put 610, since the concentrations only had 2 sig figs. I also tested the other reaction, and got answers in the 610'2. SO i don't know, hoefully I'll get credit.
Ln(h2o2) was the answer for the graph, seconds to the minus one, and I THINK the line should be drawn above the first (a slope not as steep).

OK, for 4. Here's what I did:
Zn + Ni2+ --- Zn2+ + Ni
Al(OH)3 + OH- ---- Al(OH)4 -
C2H2 + O2 --- H2O + CO2
Li + N2 --- Li3N
Pb2+ + I- === PbI2

I know everyone is right except the aluminum one (complex ion), although im pretty sure its right.

For 5, i missed the splint one, but diff reactions are supposed to occur.
CaO will be basic, SiO2 neutral, CO2 acidic (H2CO3)
Ag2S is black, 1/3 AgCl will precipitate, sol 1 is Ag NO3, 2 is Na2S, 3 is KC;.

6: C with for bonds to each F
P with five bonds to Fs
S with four bonds to F and one pair of elctrons
bond anlge is 109.5
sp3d for pf5
and seesaw for sf4
4 sigmas, 1 pi
structrue 1 is best (no formal charge)

7: NH3 is hydrogen bonding, NF3 is DIPOLE DIPOLE, difference cuz hydrogen bonding is stronger than dipole
KCl and NaCl is ionic bonding,
NaCl is stronger cuz closer atomic radii

quantum level is 3, shielding is the reason for ion. energies, cuz theres a stronger nuclear pull on the outer electrons as one goes right across periodic table

Cu is element, (for what reason, i said cuz the isotopes weights seem like to average to CU's weight)
62.93 is more abundant cuz of the weighted average concept, it's weight is closer to Cu's weight.

Ok, so that's what i did!

05-12-2005, 03:24 PM	#2
tm2000 Member Join Date: Jan 2005 Location: Wharton, University of Pennsylvania C/o 2010 Posts: 371	Ok well on number 1, i don't remember my answers. However, I know methanoic acid was stronger. I did number 3: Here's a BIG question I have here. For the value of the rate constant, i put 610. I know, when you test the 1 reaction, you get about 611.7. HOWEVER, because of sig figs, i put 610, since the concentrations only had 2 sig figs. I also tested the other reaction, and got answers in the 610'2. SO i don't know, hoefully I'll get credit. Ln(h2o2) was the answer for the graph, seconds to the minus one, and I THINK the line should be drawn above the first (a slope not as steep). OK, for 4. Here's what I did: Zn + Ni2+ --- Zn2+ + Ni Al(OH)3 + OH- ---- Al(OH)4 - C2H2 + O2 --- H2O + CO2 Li + N2 --- Li3N Pb2+ + I- === PbI2 I know everyone is right except the aluminum one (complex ion), although im pretty sure its right. For 5, i missed the splint one, but diff reactions are supposed to occur. CaO will be basic, SiO2 neutral, CO2 acidic (H2CO3) Ag2S is black, 1/3 AgCl will precipitate, sol 1 is Ag NO3, 2 is Na2S, 3 is KC;. 6: C with for bonds to each F P with five bonds to Fs S with four bonds to F and one pair of elctrons bond anlge is 109.5 sp3d for pf5 and seesaw for sf4 4 sigmas, 1 pi structrue 1 is best (no formal charge) 7: NH3 is hydrogen bonding, NF3 is DIPOLE DIPOLE, difference cuz hydrogen bonding is stronger than dipole KCl and NaCl is ionic bonding, NaCl is stronger cuz closer atomic radii quantum level is 3, shielding is the reason for ion. energies, cuz theres a stronger nuclear pull on the outer electrons as one goes right across periodic table Cu is element, (for what reason, i said cuz the isotopes weights seem like to average to CU's weight) 62.93 is more abundant cuz of the weighted average concept, it's weight is closer to Cu's weight. Ok, so that's what i did!