Hi,
The other difference is if you look what is being reacted. If a compound is being reacted with an electrophile, then it is electrophilic addition. If a compound is being reacted with a nucleophile, it is an SN2 reaction.
Search found 21 matches
- Fri Mar 17, 2017 6:46 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Electrophilic addition and Sn2
- Replies: 1
- Views: 566
- Mon Mar 13, 2017 8:21 pm
- Forum: General Rate Laws
- Topic: Difference between equilibrium constant and rate constant
- Replies: 1
- Views: 5144
Re: Difference between equilibrium constant and rate constant
The equilibrium constant, K eq is the ratio of the equilibrium concentrations of the products over the equilibrium concentrations of the reactants. This is if you are given a chemical equation and the concentrations could be in molars or sometimes in partial pressures. The rate constant, k, is used ...
- Sun Mar 12, 2017 7:23 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009362
Re: Post All Chemistry Jokes Here
What is the molecule CH2O called? Seawater!
- Tue Mar 07, 2017 10:01 pm
- Forum: *Alkenes
- Topic: cis and trans
- Replies: 1
- Views: 469
cis and trans
Are the cis and trans labels only used for alkenes or are they also required when naming alkanes and alkynes?
Thanks!
Thanks!
- Mon Mar 06, 2017 12:49 am
- Forum: *Organic Reaction Mechanisms in General
- Topic: Nucleophile strength
- Replies: 2
- Views: 635
Re: Nucleophile strength
Hi,
I would say that one of the main reasons OH- is more nucleophilic is the fact that it has an overall negative charge, which signifies that it can more easily attract positively charged atoms than water which does not have an overall negative charge.
I would say that one of the main reasons OH- is more nucleophilic is the fact that it has an overall negative charge, which signifies that it can more easily attract positively charged atoms than water which does not have an overall negative charge.
- Thu Feb 23, 2017 4:56 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 15.61
- Replies: 3
- Views: 712
Re: 15.61
Hi,
I'm not sure why it is like that in the course reader, but if you follow the actual formula where the temperature part is written as (1/T1 - 1/T2) you will get the same answer that is in the course reader.
I'm not sure why it is like that in the course reader, but if you follow the actual formula where the temperature part is written as (1/T1 - 1/T2) you will get the same answer that is in the course reader.
- Wed Feb 08, 2017 10:18 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Inert Conductors
- Replies: 1
- Views: 822
Re: Inert Conductors
Hi, An inert electrode (usually Pt) is used when there is a gas/ion electrode reaction. When you separate the main equation into the cathode and anode reactions, you have to see if there are only gases and ions present. If that is the case, then an inert electrode has to be used. If there is a solid...
- Sat Feb 04, 2017 4:10 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009362
Re: Post All Chemistry Jokes Here
Do you have any sodium hypobromite?
NaBrO.
NaBrO.
- Sun Jan 29, 2017 2:46 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: HW Ch. 8 #27
- Replies: 1
- Views: 478
Re: HW Ch. 8 #27
Hi,
For part b you should use the W = -nRTln(v2/V1).
You first have to use the ideal gas law PV = nRT to find the number of moles and then you can use the above formula. That should get you the correct answer.
For part b you should use the W = -nRTln(v2/V1).
You first have to use the ideal gas law PV = nRT to find the number of moles and then you can use the above formula. That should get you the correct answer.
- Sat Jan 21, 2017 10:35 pm
- Forum: Phase Changes & Related Calculations
- Topic: Homework chapter 8 #3 part a [ENDORSED]
- Replies: 2
- Views: 816
Re: Homework chapter 8 #3 part a [ENDORSED]
Hi, In order to solve this problem, you can use the fact that F (force) = P (pressure) x A (area) and that W (work) = F (force) x D (distance). Combining these two equations, we get W = (A x P) x D because we substituted P x A for F. The pressure is given in the problem and the area A can be calcula...
- Sun Jan 15, 2017 2:47 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009362
Re: Post All Chemistry Jokes Here
What do you do with a sick chemist?
If you can't helium, and you can't curium, then you might as well barium.
If you can't helium, and you can't curium, then you might as well barium.
- Sat Dec 03, 2016 8:49 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: What is Ka2?
- Replies: 1
- Views: 625
Re: What is Ka2?
Hi,
Polyprotic acids (acids that have more than one proton to donate) will have Ka2 values. The Ka2 value describes the constant that you should use when the polyprotic acid is losing its second proton (H+).
Polyprotic acids (acids that have more than one proton to donate) will have Ka2 values. The Ka2 value describes the constant that you should use when the polyprotic acid is losing its second proton (H+).
- Thu Nov 24, 2016 10:12 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009362
- Fri Nov 04, 2016 9:47 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Energy Level differences depending on Z
- Replies: 1
- Views: 571
Energy Level differences depending on Z
Can someone explain why the pi 2p energy level has less energy than the sigma 2p orbital when Z <8 and why the pi 2p energy level has more energy when Z>8? I understand that that is the case, but I don't understand why.
- Sat Oct 29, 2016 10:34 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Group 11 Metals Quantum Numbers
- Replies: 1
- Views: 590
Re: Group 11 Metals Quantum Numbers
This is because they are exceptions and do not follow the normal electron configuration rules (their d orbital is completely filled with only one electron in the s orbital). There are only a couple of elements that have exceptions, and Cu, Au, and Ag are three of them. It would not be correct to say...
- Thu Oct 27, 2016 1:43 am
- Forum: Lewis Structures
- Topic: Noble Gas as central atom
- Replies: 1
- Views: 1182
Re: Noble Gas as central atom
Hi, I believe it depends on the electronegativity of the elements in the compound you are trying to make a lewis structure for; if radon or krypton are the least electronegative, I imagine they could go in the center although I don't believe this is very common as it is not something I have seen bef...
- Fri Oct 21, 2016 12:19 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009362
Re: Post All Chemistry Jokes Here
How often do I make chemistry jokes?
Periodically.
Periodically.
- Thu Oct 13, 2016 11:38 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Homework Problem 1.57.
- Replies: 1
- Views: 563
Re: Homework Problem 1.57.
Hi, Since this is a Balmer series, we know that that n1 = 2, so the fifth line must be n2 = 7. You then have the use the Rydberg equation: v = Rydberg's constant x ((1/(2^2) - 1/(7^2)) After solving for this frequency (v), use c = wavelength x frequency. Plug in the frequency you just solved for and...
- Sat Oct 08, 2016 2:05 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: What exactly is Avogrado's Number? [ENDORSED]
- Replies: 1
- Views: 746
Re: What exactly is Avogrado's Number? [ENDORSED]
Generally, Avogadro's number is used when a problems asks for how many atoms/molecules/formula units of a certain element or substance there are. In that case, you can use stoichiometry to find the number of units because there are 6.022 x 10^23 units per mole. For example, say you were given a prob...
- Sun Oct 02, 2016 9:37 pm
- Forum: Student Social/Study Group
- Topic: CHEM JOKES
- Replies: 29
- Views: 6866
Re: CHEM JOKES
A neutron walks into a bar and asks, "How much for a drink?"
The bartender replies, "For you, no charge."
Haha
The bartender replies, "For you, no charge."
Haha
- Tue Sep 27, 2016 11:53 pm
- Forum: SI Units, Unit Conversions
- Topic: SI Unit Kg
- Replies: 3
- Views: 916
Re: SI Unit Kg
In most chemistry problems I've encountered in my high school chemistry courses, most answers were in grams. It might be easier to report answers in grams especially when a problem requires using dimensional analysis using the molar mass from the periodic table which is given in grams/mole.