## Search found 20 matches

Sat Mar 18, 2017 10:14 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst Equation
Replies: 3
Views: 466

### Re: Nernst Equation

No it can be at any temperature. Only the Nernst Equation that is E=E(standard)- (.05916)/n)*logQ needs to be at 298K.
Sat Mar 18, 2017 10:08 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Winter 2013 Final 1B
Replies: 4
Views: 592

### Re: Winter 2013 Final 1B

If volume increases and temperature decreases, pressure MUST decrease to satisfy the PV=nRT equation, so there's actually no way pressure would have been constant. With that said, the above post is correct.
Fri Mar 17, 2017 10:23 pm
Forum: *Alkenes
Topic: Cyclohexene example in course reader [ENDORSED]
Replies: 1
Views: 713

### Cyclohexene example in course reader[ENDORSED]

On page 102 of the course reader, there are more IUPAC naming examples of alkenes. The third example is named 1,6-dichlorocyclohexene. Why is it not 1,2-dichlorocyclohexene?
Wed Mar 15, 2017 8:04 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Order When Naming
Replies: 1
Views: 482

### Order When Naming

When naming a cyclohexane that has 1 ethyl and 2 methyl substituent on either the 1st or 3rd carbon, would you put the 1 with the ethyl and the 3 with the methyl or the other way around? (Is it 1-ethyl-3,3-dimethyl-cyclohexane or 3-ethyl-1,1-dimethyl-cyclohexane?)
Mon Feb 27, 2017 5:31 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Determining Slow Step
Replies: 1
Views: 339

### Determining Slow Step

When comparing the K of two different reactions, does the larger K mean a faster or slower reaction?
Wed Feb 15, 2017 10:28 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8501
Views: 1469065

### Re: Post All Chemistry Jokes Here

Q: Why was the mole of oxygen molecules excited when he left the singles bar?
Fri Feb 10, 2017 9:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8501
Views: 1469065

### Re: Post All Chemistry Jokes Here

An atom says, "I think I lost an electron." His friend asks, "Are you sure?" and the atom replies, "I'm positive."
Fri Feb 10, 2017 9:44 pm
Forum: Calculating Work of Expansion
Topic: Which process does more work?
Replies: 5
Views: 738

### Which process does more work?

From Chapter 8 Number 11: A piston confines 0.200 mol Ne(g) in 1.20 L at 25 degrees C. Two experiments are performed. (a) The gas is allowed to expand through an additional 1.20 L against a constant pressure of 1.00 atm (b) The gas is allowed to expand reversibly and isothermally to the same final v...
Thu Feb 02, 2017 7:22 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8501
Views: 1469065

### Re: Post All Chemistry Jokes Here

I have many chemistry jokes... I'm just afraid they won't get a good reaction.
Thu Feb 02, 2017 7:20 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8501
Views: 1469065

### Re: Post All Chemistry Jokes Here

He just couldn't put it down
Sat Dec 03, 2016 2:07 pm
Forum: Photoelectric Effect
Topic: Units in Photoelectric Effect
Replies: 1
Views: 334

### Re: Units in Photoelectric Effect

Typically the units should be in Joules/atom.
Wed Nov 30, 2016 10:43 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Ka values in multiple reactions
Replies: 1
Views: 970

### Ka values in multiple reactions

Since polyprotic acids can donate more than one proton there is more than one reaction and more than one Ka value found. After finding each Ka of each reaction, why do you multiply the Kas together to get the overall K instead of adding them?
Sat Nov 26, 2016 12:35 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Clarification of pH versus pOH [ENDORSED]
Replies: 1
Views: 305

### Re: Clarification of pH versus pOH[ENDORSED]

yes because pH+pOH=14
Fri Nov 18, 2016 9:56 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8501
Views: 1469065

### Re: Post All Chemistry Jokes Here

What do you do with a sick chemist?
You can't helium, you can't curium, so you might as well barium.
Mon Oct 31, 2016 6:17 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Homework Question on Pollarding Power of Cations
Replies: 1
Views: 354

### Homework Question on Pollarding Power of Cations

Can someone please give the answer and explanation to the question below?

Arrange the cations Rb+, Be2+, Sr2+ in order of increasing polarizing power. Give an explanation of your arrangement.
Sun Oct 30, 2016 4:29 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Seesaw angles
Replies: 1
Views: 396

### Re: Seesaw angles

Yes, the angles are slightly less than 90 and 180 degrees
Tue Oct 18, 2016 1:04 pm
Forum: Ionic & Covalent Bonds
Topic: Difference between Ionic bonds and Molecules Lewis Strructure [ENDORSED]
Replies: 1
Views: 387

### Difference between Ionic bonds and Molecules Lewis Strructure[ENDORSED]

Why are Ionic bonds' Lewis structures look different from the normal molecules lewis structures? For example, in our course reader the lewis formula for potassium chloride on page 76. Usually the normal lewis structures do not have brackets, what do these brackets for the ionic bonds mean?
Fri Oct 14, 2016 1:31 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Definition of Orbitals
Replies: 1
Views: 434

### Definition of Orbitals

Are spdf referred to as subshells or orbitals? Do orbitals mean m?
Sun Oct 09, 2016 9:51 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8501
Views: 1469065

### Re: Post All Chemistry Jokes Here

I dont trust atoms, I heard they make up everything.
Sun Oct 02, 2016 10:43 pm
Forum: Student Social/Study Group
Topic: CHEM JOKES
Replies: 29
Views: 4593

### Re: CHEM JOKES

I make horrible science puns too but only periodically.