Recent content by AbedeuS

I guess if you can't accurately measure 200 mgs for your 1 L solution you could just serial dilute something slightly heavier, say 2 g in 100 mL, take 10 mL of that, dilute with with 990 mL of solvent etc..?

Some chemicals just tend to have a high affinity to water. So in the case of your Na2CO3 it may well have been crystallized from water or in a wet environment and its affinity for water dictates that the lowest energy pathway to crystallization just so happens to include any nearby water...

PhaseShifter hit the nail on the head here. The electronegativity still persists Cheman, but bonding cannot occur due to the high energy nature of the upper level shells. However, intermolecular forces due to the electronegative nature of oxygen and electropositive nature of hydrogen do persist...

Any NMR chemists about?

Hey, I've recently started to revise for a spectroscopy test and had a random retardation moment where I asked myself "Why don't protons on a methyl group couple to eachover?" The answer seemed obvious, there all in the same chemical environment and all sigma bonded to whatever substituent you...

3 chemical compounds in one recent media report? Or new scientist or something?

Orbital outlay on O: 1s^2 2s^2 2p^6 Unhybradized bonding would have a sigma bond between the s orbital of hydrogen and a parallel p orbital, the next bond would also be between an s orbital of hydrogen and another, parallel yet available p orbital (lets say pz for one py for the other)...

I think that going off the assumption that \Delta T = T_{ball} - T_{water} might be where the deviation is arising, remember, the ball is heating up a limited amount of water up until a point when T_{ball} = T_{water}, your case would be true if there was a massive amount of water relative to...

Ah cool, didn't see it like that :D

I wasnt offended or anything, it just seemed you went a little overly harsh to somone attempting to contribute to a purely educational forum. As for system/surroundings, some people seem to use the convention that the "system" includes the "Surroundings" this is used to debunk stupid things like...

To be honest, I just threw this out, I am not even 100% sure if any of this maths is right as it seemed to be a slippery slope trying to solve this one. I just put this here to show that the community here do try and make an effort, but this one is whey out of my range. pH is...

So its: C_p ln(398) - 0^2?

I would explain that using: ln(\frac{K_2}{K_1}) = -\frac{\Delta _r H^{\circ}}{R}(\frac{1}{T_2}-\frac{1}{T_1}) (Van't Hoff Equation)

a negative gibbs free energy change corresponds to an increase in the entropy of the system Is a correct statement, because the enthalpy releases energy to the surroundings that then become "The system" in order to compensate for the fact that the "universe" is a closed system in itself. I...

Whats all this Xn+/X malarchy? Is that the representation of the half cell? If so please make it slightly more clear what's being read my understanding is: X|X+||Y+|Y but I am not really getting it O_o