Borek

Missed that one Borek -- General Chemistry Software www.pH-meter.info

Write equation for equilibrium (with the reaction quotient) first. The think what are dependences between amounts of the substances (hint: is there any dependence between amount of chlorine produced and amount of PCl5 decomposed?). Then plug in all numbers you know and look if you can solve the equation. Borek -- General Chemistry Software www.pH-meter.info

Such statement holds only for ideal gases. Best, Borek -- General Chemistry Software www.pH-meter.info

It depends on conditions. When the temperature is high enough and pressure is low enough that the gas can be treated as ideal, kind of gas doesn't matter. The closer you are to the gas condensation, the less ideal gas is and the discrepancies between ideal and real behavior are larger. Note that it doesn't necesarilly mean some exotic conditions - water at 110 deg C and 1 atm is a non-ideal gas, methanol need 65 deg C to boil and to become non-ideal gas and so on. One of the assumptions in the ideal gas theory is that the molecules have zero volume. That's never true, however, when the molecule size is much smaller than the distance between molecules, this assumption is meet well enough. When the pressure and temperature conditions gets such that molecules get close to each other, their size can be no longer neglected. Ideal gas equation (PV=nRT) doesn't hold then (look for the Van der Waals equation). Note that in most questions where you will be asked about gas volume/number of moles you will be expected to use ideal gas approximation. Best, Borek -- General Chemistry Software www.pH-meter.info

Not sure about details, but this mixture can be both eutectic (when it solidifies) and azeotropic (when it boils). Best, Borek -- General Chemistry Software www.pH-meter.info

Just in case - molarity and molality definitions. Not that answers your question though. Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

How to convert percentage to molarity

Try these concentration lectures.

http://wired.com/wired/archive/14.06/chemistry_pr.html Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

Check this out: stoichiometric calculations Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

Great one - this purple smoke looks perfect Best, Borek -- Chemical calculators at www.chembuddy.com www.pH-meter.info

Well, you were already told that the problem is in dilution, but here is almost identical pH calculation question with explanation. Best, Borek -- Chemical calculators at www.chembuddy.com www.pH-meter.info

You may use bulk density for loose KCl. Engineers do such things every day Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

Assuming you did the first question right - yes. Best, Borek -- Chemical calculators at www.chembuddy.com chemical equation balancer and stoichiometry calculator www.pH-meter.info

You may expect about 0.7g lift per L of mixture volume. Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

Ewing's Analytical Instrumentation Handbook? Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

http://en.wikipedia.org/wiki/Quintuple_Bond http://pubs.acs.org/cen/news/83/i39/8339notw1.html Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

ARe you planning to measure pH with termometer? AFAIK sound waves from normal loudspeaker will not have energy high enough. You need higher frequencies, that's why in sonochemistry ultrasounds are used. Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

Nothing. Answer was above signature, not below And judging from the fact that Peltier coolers were later mentioned twice - it was a good answer. Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

Google Peltier effect. Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

Sulphuric given here: some pKa values Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

Whether it does or not, depends on the paper and acid, so this question can't be answered. If you pour concentrated sulfuric acid on paper it will dehydrate cellulose, leaving mostly carbon, thus it will be black or brown. Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

No. There are high differences in kinetics of H and D, and they are not due to number of protons Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

OK, I know. It is elephant toothpaste. http://library.thinkquest.org/10429/low/cool/labs/elephantlab.htm Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info

Looks like some polyurethane to me. Best, Borek -- Chemical calculators at www.chembuddy.com equation balancer and stoichiometry calculator www.pH-meter.info