Search found 11 matches

by Shreyesi Srivastava 2D
Wed Dec 10, 2014 5:42 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Flashcards: VSEPR Geometries
Replies: 2
Views: 549

Re: Flashcards: VSEPR Geometries

Oh right! Thanks for letting me know- I'll fix them also!
by Shreyesi Srivastava 2D
Wed Dec 10, 2014 12:17 am
Forum: Naming
Topic: bis and tris
Replies: 3
Views: 4899

Re: bis and tris

You use bi and tri when the compound already has a di/tri type naming in it. For example, ethylenediamine already has di because it is referring to its two amine compounds; in this case, you would use bis if you had two of these. It would be called bisethylenediamine.
by Shreyesi Srivastava 2D
Wed Dec 10, 2014 12:15 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Br 2+
Replies: 7
Views: 2641

Re: Br 2+

Someone else had this issue and posted it here as well. If you do the molecular orbital diagram Br2 2+ is paramagnetic- it has unpaired electrons in the 3pi*x and 3pi*y. However, Br2 is diamagnetic as shown in this: http://chemwiki.ucdavis.edu/@api/deki/files/10233/solution_to_problem_5.jpg?size=bes...
by Shreyesi Srivastava 2D
Wed Dec 10, 2014 12:10 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Flashcards: VSEPR Geometries
Replies: 2
Views: 549

Flashcards: VSEPR Geometries

I made a quick set of flashcards to study VSEPR geometries. It has the name and degrees on one side and the description with a picture on the other side. For example it says 2 bonds and 0 lone pairs, AX2. Here is the link if you want to study it: http://quizlet.com/62137138/flashcards"onclick="windo...
by Shreyesi Srivastava 2D
Tue Dec 09, 2014 11:51 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: (Br2)2+ Paramagnetic or Diamagnetic
Replies: 3
Views: 1731

Re: (Br2)2+ Paramagnetic or Diamagnetic

Which final are you talking about? I drew a molecular orbital diagram for (Br2)2+ and agree with you; it is paramagnetic with unpaired electrons in its 3pi*x orbital and 3pi*y. If the question was asking about just Br2 then it would be diamagnetic because the two electrons we took away to form 2+ wo...
by Shreyesi Srivastava 2D
Tue Dec 09, 2014 11:43 pm
Forum: *Titrations & Titration Calculations
Topic: Henderson- Hasselbalch equation
Replies: 1
Views: 331

Re: Henderson- Hasselbalch equation

The Henderson-Hasselbalch equation is used for problems involving pH. ICE tables are used when you change concentrations or have different initial and ending equilibriums. The problems usually involve weak acids/bases and salts. Another key term to look for is "buffers" because it will pro...
by Shreyesi Srivastava 2D
Tue Dec 09, 2014 11:26 pm
Forum: Amphoteric Compounds
Topic: Taking Autoprotolysis into Account
Replies: 1
Views: 696

Re: Taking Autoprotolysis into Account

Autoprotolysis is taken into account in two different ways for strong acids and weak acids. For strong acids and strong bases, you only have to take autoprotolysis in to account when the concentration of the strong acid or base is less than 10^-6 mol/L. The process is similar for weak acids. You hav...
by Shreyesi Srivastava 2D
Tue Dec 09, 2014 9:49 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Graph of a Concentration
Replies: 2
Views: 449

Re: Graph of a Concentration

If you want a graphical representation of what Anuk is saying, here you go. These graphs are pretty general for graphing concentration against time for any reaction. Note that for products, the initial concentration starts at 0 where as for reactants, the initial concentration is higher. They both p...
by Shreyesi Srivastava 2D
Tue Dec 09, 2014 9:34 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lewis structures that obey the octet rule
Replies: 3
Views: 1522

Re: Lewis structures that obey the octet rule

I agree with Helen. Double bonds do not indicate expanded octets; they are often used in order to obey the octet rule. All lewis structures should obey the octet rule except for a few special cases. These include: 1. Species with an odd number of electrons, otherwise known as free radicals. An examp...
by Shreyesi Srivastava 2D
Mon Nov 24, 2014 1:56 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7951
Views: 1368008

Re: Chemistry Jokes

Do you have 11 protons?
Cause you sodium fine

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