Tuesday, January 16, 2007
Tuesday, Day 3
Enjoy the last day of warmth...the rest of this week will be very cold...
AP: we went through a litany of definitions and equations today: relating rates of appearance of reactants to rates of disappearance of products to the rate of reaction, which is really the rate "per mole of reaction". We discussed elementary steps of a proposed reaction mechanism, the molecularity and order of each step, the initial requirement for plausibility of a proposed mechanism (the sum of the elementary steps MUST yield the balanced overall stoichiometric equation). We introduced RATE LAW, which is "rate= k[A]^x[B]^y..." and RATE CONSTANT, which is the "k" in the rate law equation.
These terms and equations will make sense ONLY if you practice and apply them regularly so that you know how, when, and where to use them! Of course, we will be doing many examples in class for the rest of the week. On Friday, as part of our test, we will have a section on descriptive chemistry and naming metal-ligand complex.
Honors: we reviewed the explanation for the relatively high melting points of salts/ionic compounds. We then explained both the nonconductivity of solid ionic compounds/salts and the excellent conductivity of molten ionic compounds in terms of ion and electron net mobility or lack thereof.
We started to explain the first of several types of attractions, ion-dipole attractions, which account for the dissolving of salts in POLAR molecular solvents such as water; these attractions are NOT bonds because they are much weaker per attraction than any type of covalent, ionic, or metallic bond. I will post the videos/animations from today's lesson when I get home.
Regents: we reviewed the explanation for the relatively high melting points of salts/ionic compounds. We then explained both the nonconductivity of solid ionic compounds/salts and the excellent conductivity of molten ionic compounds in terms of ion and electron net mobility or lack thereof.
For additional points towards your quarterly average, here is the next written homework to be handed in on Friday:
Orange Review Book Topic 6: Bonding
Clearly and completely define each of the terms in the unit Vocabulary List on page 79.
Hand that in with the complete and accurate corrections from your last test, which I will return to you later this week.
AP: we went through a litany of definitions and equations today: relating rates of appearance of reactants to rates of disappearance of products to the rate of reaction, which is really the rate "per mole of reaction". We discussed elementary steps of a proposed reaction mechanism, the molecularity and order of each step, the initial requirement for plausibility of a proposed mechanism (the sum of the elementary steps MUST yield the balanced overall stoichiometric equation). We introduced RATE LAW, which is "rate= k[A]^x[B]^y..." and RATE CONSTANT, which is the "k" in the rate law equation.
These terms and equations will make sense ONLY if you practice and apply them regularly so that you know how, when, and where to use them! Of course, we will be doing many examples in class for the rest of the week. On Friday, as part of our test, we will have a section on descriptive chemistry and naming metal-ligand complex.
Honors: we reviewed the explanation for the relatively high melting points of salts/ionic compounds. We then explained both the nonconductivity of solid ionic compounds/salts and the excellent conductivity of molten ionic compounds in terms of ion and electron net mobility or lack thereof.
We started to explain the first of several types of attractions, ion-dipole attractions, which account for the dissolving of salts in POLAR molecular solvents such as water; these attractions are NOT bonds because they are much weaker per attraction than any type of covalent, ionic, or metallic bond. I will post the videos/animations from today's lesson when I get home.
Regents: we reviewed the explanation for the relatively high melting points of salts/ionic compounds. We then explained both the nonconductivity of solid ionic compounds/salts and the excellent conductivity of molten ionic compounds in terms of ion and electron net mobility or lack thereof.
For additional points towards your quarterly average, here is the next written homework to be handed in on Friday:
Orange Review Book Topic 6: Bonding
Clearly and completely define each of the terms in the unit Vocabulary List on page 79.
Hand that in with the complete and accurate corrections from your last test, which I will return to you later this week.
# posted by C @ 10:07 AM 
