Electrochemistry
Although I have long believed balloons to be mostly ineffective (in a laboratory setting), sometimes I use them for the placebo effect. In fact, I've made the following claims to our lab:
1. Balloons are permeable to O2!
Source - Knowledge accrued through chemistry - Ni(0).
2. Balloons are not permeable to moisture!
Source - Knowledge accrued through chemistry.
3. How do I really be air free in the lab?
-Degassing by argon sparging (15m) or freeze pump thaw? I've never seen a real difference here... the rumor is freeze-pump-thaw is more effective... (but sparging worked fine for Ni(0).)
-The solvent system solvents are oxygen free. I used to pull fresh ether straight from the solvent system and wash my Ni(cod)2.
-Schlenk flasks and use proper shlenk technique
-Use the golvebox
4. Remember, most of what we (BaranLab) do isn't that O2 sensitive, so don't worry too much. (However, we do a lot that needs to be water free!)
5. But Dane, you've got 3 balloons in your hood right now!
-yes, I know, they make me feel emotionally stable; we stir our homogenous reactions too, which is also unnecessary.
- 10.2 Nernst Equation
Electrochemistry : 10.2 Nernst Equation NERNST EQUATION Cell potential (E°cell) under any condition Ecell = E°cell – (RT/nF) ln Q R: universal gas constant. Q...
- Standard Hydrogen Potential
Standard Reduction PotentialsStandard reduction potential (E0) is the voltage associated with a reduction reaction at an electrode when all solutes are 1 M and all gases are at 1 atm. Standard hydrogen electrode (SHE) Reduction Reaction ...
- Galvanic Cell
Oxidation is defined as the addition of oxygen to a substancethe loss of hydrogen from a substancethe...
- Electrochemistry : 10.2 Nernst Equation
NERNST EQUATION Cell potential (E°cell) under any condition Ecell = E°cell – (RT/nF) ln Q R: universal gas constant. Q...
- Thermochemistry : 9.3 Born-haber Cycle
First Ionization Energy (IE1)Energy required for 1 mol of gaseous atom to lose 1 mol of electrons. Affinity Electron (EA) Energy change that occurs when 1 mol of gaseous atom gains 1 mol of electrons. Lattice EnergyEnergy change when 1 mol of solid...
Electrochemistry
New Balloons
Although I have long believed balloons to be mostly ineffective (in a laboratory setting), sometimes I use them for the placebo effect. In fact, I've made the following claims to our lab:
1. Balloons are permeable to O2!
Source - Knowledge accrued through chemistry - Ni(0).
2. Balloons are not permeable to moisture!
Source - Knowledge accrued through chemistry.
3. How do I really be air free in the lab?
-Degassing by argon sparging (15m) or freeze pump thaw? I've never seen a real difference here... the rumor is freeze-pump-thaw is more effective... (but sparging worked fine for Ni(0).)
-The solvent system solvents are oxygen free. I used to pull fresh ether straight from the solvent system and wash my Ni(cod)2.
-Schlenk flasks and use proper shlenk technique
-Use the golvebox
4. Remember, most of what we (BaranLab) do isn't that O2 sensitive, so don't worry too much. (However, we do a lot that needs to be water free!)
5. But Dane, you've got 3 balloons in your hood right now!
-yes, I know, they make me feel emotionally stable; we stir our homogenous reactions too, which is also unnecessary.
It is with all this in mind that I say: these new balloons are sweet as hell.
- 10.2 Nernst Equation
Electrochemistry : 10.2 Nernst Equation NERNST EQUATION Cell potential (E°cell) under any condition Ecell = E°cell – (RT/nF) ln Q R: universal gas constant. Q...
- Standard Hydrogen Potential
Standard Reduction PotentialsStandard reduction potential (E0) is the voltage associated with a reduction reaction at an electrode when all solutes are 1 M and all gases are at 1 atm. Standard hydrogen electrode (SHE) Reduction Reaction ...
- Galvanic Cell
Oxidation is defined as the addition of oxygen to a substancethe loss of hydrogen from a substancethe...
- Electrochemistry : 10.2 Nernst Equation
NERNST EQUATION Cell potential (E°cell) under any condition Ecell = E°cell – (RT/nF) ln Q R: universal gas constant. Q...
- Thermochemistry : 9.3 Born-haber Cycle
First Ionization Energy (IE1)Energy required for 1 mol of gaseous atom to lose 1 mol of electrons. Affinity Electron (EA) Energy change that occurs when 1 mol of gaseous atom gains 1 mol of electrons. Lattice EnergyEnergy change when 1 mol of solid...