<p>Hmm do you count the network covalent and metallic as IMF? </p>
<p>london, dipole-dipole, hydrogen, ionic?</p>
<p>Metallic and Network covalent are both equally the same strength? I thought one of them was stronger than the other.</p>
<p>Well covalent networks has a waaaay higher melting point. Silicon, diamond etc</p>
<p>I thought it went (Strongest to Weakest):
Covalent Network (C, Si)
Regular Covalent
Ionic (salts; NaCl)
Metallic (Metals obviously, Ag, Pb)
Hydrogen (H-F, H-N, H-O; NH3)
Dipole-Dipole (polar molecules, H2S)
London disperse forces (non-polar molecules, CH4)</p>
<p>Can somebody help me with Ksp and thermo. what’s a galvanic cell?? anything else on electrolysis. this was my teacher’s first year in AP Chem and I never had a previous chem class so anymore great links are appreciated.</p>
<p>I think thats right, except I had the impression metallic bonding was stronger than ionic</p>
<p>Yes, network covalent is definitely the strongest. Regular covalent and ionic are comparable but I think covalent tend to be stronger. (Think less apt to ionize in water). And then the rest Ohsacul sounds right to me what you have there.</p>
<p>Can someone explain hydrogen bonding again. I get it really confused w/ other London dispersion forces.</p>
<p>^^ I thought ionic was strongest out of all the bonds because they contain opposite ions.</p>
<p>H bond is when Hydrogen bonds with either F or O, N of another molecule. Remember “h bonds are fu(o)n”</p>
<p>Covalent (regular shared e-) is stronger than ionic.</p>
<p>nitrogen, oxygen, or flourine with hydrogen. [Chemical</a> Bonds](<a href=“http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/bond.html]Chemical”>Chemical Bonds). and covalent network > ionic.</p>
<p>Thank Velleity. Just looked it up and my chem teacher screwed us over. Covalent bonding is definitely stronger than ionic.</p>
<p>Ksp–remember that you never include the reactants in the expression because they are solids.</p>
<p>Thermo–well what about it? Haha there’s a lot. I just have to remember the difference between determining delta H for reactions with bond energies given and heat of formations given. Bond energies delta H = bonds broken-bonds formed (reactants-products) whereas when heat of formation its products-reactants.</p>
<p>Galvanic cells are spontaneous cells where electrons from from anode (-) to cathode (+) and the overall voltage is + hence the spontaneous part. Electrolytic have an overall negative voltage and are non spontaneous. O and don’t forget to include the salt bridge :)</p>
<p>Which of the following ions may be detected safely by its odor after a simple chemicla reaction?
Oxidation states
CO3 (two minus)
Sr (plus two)
NO3 (minus)
NH4( plus)
MnO4( minus)</p>
<p>Exothermic has a negative delta H right and Endothermic has a positive delta H??</p>
<p>It’s NH4+, because rotten eggs give off an (ammonia) smell. That’s not a very common question, so you may want to go back to major concept MC.</p>
<p>[SparkNotes:</a> Electrolytic Cells: Electrolysis](<a href=“http://www.sparknotes.com/chemistry/electrochemistry/electrolytic/section1.html]SparkNotes:”>http://www.sparknotes.com/chemistry/electrochemistry/electrolytic/section1.html)
^ Differences between galvanic and electrolytic cells</p>
<p>Thanks for the bonding help, everyone! Ohascul and velleity got it right, Sixth Sense was really close.</p>
<p>I think it’s nice to go over the cases of delta G, S, and H.</p>
<p>Spontaneity can only be confidently deduced from G. Negative G is spontaneous.</p>
<p>Cases:
delta H -
delta S +
spontaneous at all temperature</p>
<p>H +, S- nonspontaneous at all temperature</p>
<p>H-, S-, spontaneous at low temp, non at high</p>
<p>H+, S+, nonspontaneous at low, spon at high.</p>
<p>Know the equation temp = Delta H/delta S</p>
<p>Sorry reading “galvanic cells” triggered all of that for some reason.</p>
<p>yeah. delta H is negative if endo thermic and positive if exothermic</p>
<p>Thanks for that velleity =]</p>
<p>If ever in doubt though,
just consult dG = dH - TdS and figure it out from that. (If you can’t memorize what velleity posted)</p>
<p>terrence is that u from MSD???</p>