Borek
-
Posts
101 -
Joined
-
Last visited
Content Type
Profiles
Forums
Events
Posts posted by Borek
-
-
Check out the lecture:
http://www.chembuddy.com/?left=pH-calculation&right=pH-weak-acid-base
and example question:
http://www.chembuddy.com/?left=pH-calculation-questions&right=pH-weak-acid-q1
pKa = 3.45
However, calculation for 27M solution will be not accurate, as the activities start to play important role.
Try BATE to calculate pH.
Best,
Borek
--
0 -
There even was (is?) a set of symptoms common to gulf-war participants (mainly soldiers) that was initially attributed to uranium dust. Can't remember how it was called, no idea whether it holded under investigation.
Best,
Borek
--
0 -
Polymers can get quite large. Especially these creating interchain bonds - bakelite behaves this way if I recall correctly. Looks like whole casing of my gradpa radio was one particle
Best,
Borek
--
0 -
Check this out:
http://www.chembuddy.com/?left=pH-calculation&right=toc
Best,
Borek
--
0 -
Try with diluted bleach. Try it first somwehere under the furniture to be sure you are not creating more stains.
Best,
Borek
--
0 -
Bananas are easier to remove than a potato.
Corkscrew.
Best,
Borek
--
0 -
0
-
Put some sodium bicarbonate into aquarium, add some vinegar. CO2 evolves yet it is heavy enough to stay in the aquarium.
Next, do some soap bubbles (how they are called in English?) and let them float in the aquarium - they will float on the CO2 cushion.
Get some jar, get CO2 from the aquarium (seems funny, as you are trying to get "nothing" into the jar) and pour it onto the light candle.
Best,
Borek
--
0 -
You pay k$ for the product prediction, not for balancing.
Best,
Borek
--
0 -
that would take waaaay too long. you can buy such software for a few thousand dollars.
And it is not enough to put reagents in, as parameters like pressure, temperature or pH can change everything. I doubt such software will be ever able to predict all reactions.
Best,
Borek
--
0 -
How about typing up the merk index for us?
No way. But I have already typed in density tables for over 300 reagents, check CASC pages.
Best,
Borek
--
0 -
Could you elaborate? What do you mean by 'molarity of chemical formula'?
What exact information do you want to get from chemical formula?
Best,
Borek
--
0 -
Some of you are aware of the fact I have already prepared two chemical calculators (see signature). I am planning to extend the line of programs and I have several ideas about what could the next calculator do. However, before starting work I decided to do a quick poll:
What type of calculations would you like to have automated?
Which calculations are the most tedious?
Which calculations are eating most of your time, regardless of the fact that you know how to do them?
Best,
Borek
--
0 -
Just liquid. If it was a solution (ie mixed with water) I doubt there will be strong exothermic reaction.
Besides, how do you want to inject crystals?
Best,
Borek
--
0 -
im pretty sure NaOH wouldnt react with Al2O3
You are pretty wrong - aluminum is amphoteric and it reacts both with acids and bases. Al2O3 is stable and highly resistive to corrosion only in pH of around 7. Acid rain or alkalic soap solution are enough to remove oxide layer. New layer is created immediately, but if there is enough acid or base you will be able to dissolve aluminum completely.
Best,
Borek
--
0 -
Ethylene glycol can be replaced be glycerine if I recall correctly.
You just inject glycol into the dry permanganate. It gets hot due to glycol oxidtaion until it starts to burn. Ping pong ball is made of nitrocelluloid so once it starts to burn it gives long flame.
We made smoke bombs from ping pong balls when I was a kid
Best,
Borek
--
Chemical calculators at www.chembuddy.com
Smarkotan oz gluthozmaz
0 -
why the standard reduction potential for
2H+(aq)+2e----> H2(g) is 0?
That implies H+ is not reactive.
No. It is zero just because it was selected as a reference.
Best' date='
Borek
--
Chemical calculators for labs and education
0 -
You can try to use periodic table to predict charge at best - there are nasty irregularities. But if you have no idea what the charge should be periodic table is better than nothing.
Best,
Borek
--
Chemical calculators for labs and education
0 -
OK, assuming H2O is an acid (in a way it is) and thus NaOH is a salt, how do you define hydroxide?
Best,
Borek
--
Chemical calculators for labs and education
0 -
I agree that NaOH is the best selection for the electrolyte for water electrolysis. However, I disagree that NaOH is a salt
Best,
Borek
--
Chemical calculators for labs and education
0 -
Chlorine on the anode and hydrogen on the cathode.
Best,
Borek
--
Chemical calculators for labs and education
0 -
Yes, you calculated that saturated solution contains more than 1mg/L, so the 1mg/L solution is not saturated - ie possible.
Best,
Borek
--
Chemical calculators for labs and education
0 -
??? Table salt doesn't contain iodine - unless it is iodine enriched, but even then I doubt it makes sense to use it a iodine source... Add some chlorine water to convert iodide to iodine and some nonpolar solvent for extraction.
Best,
Borek
--
Chemical calculators for labs and education
0 -
Taking more formal approach:
Kso = [Ag+][Cl-]
If there is nothing else in the solution, [Ag+] = [Cl-] and that's the case you already did.
In the presence of Cl-:
[Ag+] = Kso/[Cl-]
and the [Ag+] is the amount of AgCl dissolved.
Best,
Borek
--
Chemical calculators for labs and education
0
separating carbon dioxide from biogas
in Organic Chemistry
Posted
Ca(OH)2. It should be also possible to freeze it out, although it may be expensive. Perhaps just water will be effective - IIRC CO2 dissolves much better in water then methane does.
Best,
Borek
--
Chemical calculators at www.chembuddy.com
pH calculation
concentration conversion