Stack Exchange

Karsten Theis

Westfield, MA, USA

http://www.westfield.ma.edu/academics/chemistry-degrees/faculty-staff/karsten-theis

Structural biologist teaching biochemistry. Preferred pronouns: he, him, his.

top accounts reputation activity favorites subscriptions
Top Questions
14 votes

Is there a difference between equilibrium and steady state?

equilibrium kinetics terminology asked Mar 11 at 4:46
chemistry.stackexchange.com

12 votes

Is there a name for this algorithm to calculate the concentration of a mixture of two solutions containing the same solute?

solutions analytical-chemistry concentration terminology asked Mar 23 at 22:15
chemistry.stackexchange.com

11 votes

Boltzmann factor vs. graph of Maxwell–Boltzmann distribution

physical-chemistry kinetics asked Jan 31 at 19:24
chemistry.stackexchange.com

9 votes

How to you show a 3-center 2-electron bond in a Lewis structure?

bond notation asked Jun 7 at 13:29
chemistry.stackexchange.com

8 votes

What are the degrees of freedom that define the temperature of an ionic solid (such as sodium azide)?

temperature asked Sep 14 at 11:32
chemistry.stackexchange.com

7 votes

How accurately does (pKa1 + pKa2) / 2 estimate the pH of an amphoteric salt?

acid-base ph asked Apr 28 at 17:59
chemistry.stackexchange.com

7 votes

How can you use ICE tables to solve multiple coupled equilibria?

equilibrium asked Mar 15 at 18:58
chemistry.stackexchange.com

6 votes

What is the Gibbs energy of dissolving a solid in pure water?

thermodynamics asked Apr 9 at 18:07
chemistry.stackexchange.com

6 votes

Molecule with a quadrupole moment in an electric field

molecular-structure asked Jan 26 at 3:58
chemistry.stackexchange.com

6 votes

Changes in pH when adding substances other than acids or bases

acid-base experimental-chemistry asked Jan 4 at 14:11
chemistry.stackexchange.com

1 2

Top Answers
20
How were x-ray diffraction patterns deciphered before computers?
chemistry.stackexchange.com

19
Is there a difference between equilibrium and steady state?
chemistry.stackexchange.com

15
Why does a tetrahedral molecule like methane have a dipole moment of zero?
chemistry.stackexchange.com

14
Why does liquid water form when we exhale on a mirror?
chemistry.stackexchange.com

13
Quadrupole moment of a molecule
chemistry.stackexchange.com

13
Pauli exclusion principle
chemistry.stackexchange.com

12
Distinguishing between octahedral and tetrahedral holes
chemistry.stackexchange.com

11
Why are isotopes an issue in reading mass spectra?
chemistry.stackexchange.com

9
DNA pairs (adenine-thymine, guanine-cytosine)
chemistry.stackexchange.com

8
What is kekulization (in RDKit)?
chemistry.stackexchange.com

8
Barron states that 4.18×10⁸ joules equal 1 kcal, is this correct?
chemistry.stackexchange.com

8
How can you use ICE tables to solve multiple coupled equilibria?
chemistry.stackexchange.com

7
Is heat just a change in temperature?
chemistry.stackexchange.com

7
Finding the repeating unit of polymerisation given two constituent molecules
chemistry.stackexchange.com

7
What are similarities and differences among shells, orbitals, subshells, and energy levels?
chemistry.stackexchange.com

7
Why is my solution for the partial pressures of two different gases incorrect?
chemistry.stackexchange.com

7
When to use 1/Ka vs Kb
chemistry.stackexchange.com

7
Can precipitation reactions attain equilibrium?
chemistry.stackexchange.com

6
Same Activation Energy for Forward and Backward Reactions
chemistry.stackexchange.com

6
In the last step of Kjeldahl Method, is the reaction of ammonium to NaOH not taken into account?
chemistry.stackexchange.com

6
Does energy come from fuel or oxygen? (surprise?)
chemistry.stackexchange.com

6
How are lowercase m and uppercase M used in general chemistry courses?
chemistry.stackexchange.com

6
Is an acid a salt or not?
chemistry.stackexchange.com

6
Can =NH2+ in Arginine's side chain form hydrogen bonding at physiological pH?
chemistry.stackexchange.com

6
Why does the solubility of some salts decrease with temperature?
chemistry.stackexchange.com

6
Why is my conclusion inconsistent with the van't Hoff equation?
chemistry.stackexchange.com

6
Which acid/base does a strong base/acid react when added to a buffer solution?
chemistry.stackexchange.com

6
Understanding the structure of NCS⁻
chemistry.stackexchange.com

5
What is wrong with storing deionized water in glass containers?
chemistry.stackexchange.com

5
Mechanism of ring formation of an epoxide under acidic aqueous conditions
chemistry.stackexchange.com

1 2