Search found 16 matches
Search found 16 matches • Page 1 of 1
- Mon Jan 16, 2017 3:22 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Units of Reaction Enthalpies
- Replies: 11
- Views: 1624
It can be either kJ/mol or kJ, just keep in mind the coeffecients of the products and what the question wants you to give as a final answer.
- Sat Dec 03, 2016 12:07 pm
- Forum: General Science Questions
- Topic: ICE Box [ENDORSED]
- Replies: 2
- Views: 612
You will most likely be using them in weak acid and base problems to find their equilibrium concentrations; usually some indicators that you will have to use an ICE table is that they are asking for the concentrations and they have provided you with a "k" value (kb or ka).
- Thu Dec 01, 2016 5:42 pm
- Forum: *Titrations & Titration Calculations
- Topic: Hwk 13.29
- Replies: 5
- Views: 2972
Your final gram calculation for the NaOH is 1 decimal place off, but your final percentage is still correct...weird, must of just had a typo or something. *thumbs up*
- Mon Nov 21, 2016 5:14 pm
- Forum: Conjugate Acids & Bases
- Topic: Conjugate Acids & Conjugate Bases? [ENDORSED]
- Replies: 2
- Views: 1179
Examples: Weak acid and its conjugate base: CH3COOH + H2O<--> (CH3COO-) + (H30+); in this example, acetic acid (CH3COOH) loses a proton (H+) and becomes its conjugate base: an acetate ion. Weak Base and its conjugate acid: NH3 + H2O<--> (NH4+) + (OH-); in this example, ammonia (NH3) gains a proton (...
Think of it like this: generally, single bonds are sigma bonds and each additional bond (i.e. within double and triple bonds) is a pi bond (double bonds have 1 sigma bond and 1 pi bond, triple bonds have 1 sigma bond and 2 pi bonds).
I don't know the exact length of a triple bond, but it's not that important to know the exact length of single, double, and triple bonds as these lengths vary between molecules. What is important is that bond length decreases as it goes from single>double>triple.