Search found 1562 matches

by ChenBeier
Mon Aug 23, 2021 2:48 am
Forum: Chemistry forum
Topic: Flavouring unflavoured Essential Amino Acids / BCAAs
Replies: 3
Views: 3791

Re: Flavouring unflavoured Essential Amino Acids / BCAAs

What is the topic, for what you need the Amino acids.
by ChenBeier
Mon Aug 23, 2021 2:45 am
Forum: Chemistry forum
Topic: 4-Nitrophthalonitrile Supplier
Replies: 1
Views: 3121

Re: 4-Nitrophthalonitrile Supplier

No commercials here.
by ChenBeier
Mon Aug 23, 2021 2:45 am
Forum: Chemistry forum
Topic: Question based on Titration and pH computation
Replies: 9
Views: 8133

Re: Question based on Titration and pH computation

Compare the theoretical consumption with the real one.
Calculate the moles you used and the moles of the NaOH react.
by ChenBeier
Sun Aug 22, 2021 3:39 am
Forum: Chemistry forum
Topic: Making Potassium Citrate from Citric Acid From Lemons
Replies: 4
Views: 4229

Re: Making Potassium Citrate from Citric Acid From Lemons

Carbonate will be destroyed by acid to CO2 and water. So this can be used. Hydroxid get neutralization to water. All others have not effekt.
by ChenBeier
Sat Aug 21, 2021 3:24 am
Forum: Chemistry forum
Topic: Making Potassium Citrate from Citric Acid From Lemons
Replies: 4
Views: 4229

Re: Making Potassium Citrate from Citric Acid From Lemons

Potassium hydrogen carbonate, potassium carbonate and potassium hydroxide can be used.
by ChenBeier
Thu Aug 19, 2021 11:22 pm
Forum: Chemistry forum
Topic: palladium chloride synthesis?
Replies: 1
Views: 3103

Re: palladium chloride synthesis?

Palladium(II) chloride is prepared by dissolving palladium metal in aqua regia or hydrochloric acid in the presence of chlorine. Alternatively, it may be prepared by heating palladium sponge metal with chlorine gas at 500 °C.
by ChenBeier
Thu Aug 19, 2021 11:17 pm
Forum: Chemistry forum
Topic: Assistance to find value of Constant a and Constant b
Replies: 2
Views: 3448

Re: Assistance to find value of Constant a and Constant b

Here we go Propadiene a = 8,23 l^2* bar/ mol^2, b= 0,0747 l/mol Methylacetylene is Propyne a = 8,4 l^2*bar/mol^2, b= 0,0744 l/mol https://www.google.com/url?q=https://drjvazque.files.wordpress.com/2017/08/propiedades-criticas.pdf&sa=U&ved=2ahUKEwjks6Gn-L7yAhXFxoUKHWKhAJQQFnoECAgQAQ&usg=A...
by ChenBeier
Mon Aug 16, 2021 8:46 am
Forum: Chemistry forum
Topic: calculation of molar fraction and pressure
Replies: 3
Views: 3835

Re: calculation of molar fraction and pressure

I am really sorry to hear that a fire is close to your place. This planet is dying.

Your results are correct.
by ChenBeier
Fri Aug 13, 2021 12:30 pm
Forum: Chemistry forum
Topic: Unit conversions (electrical)
Replies: 1
Views: 3314

Re: Unit conversions (electrical)

All nonsense

1 J = Nm =1 Ws = 1 VAs

3,7 Watt is power not not work, the time is missing
13320 J is 13320 VAs = 3,7 VAh
The Charge is 7,2 * 10^-3 Ah, if the voltage is known then the work can be calculated.
by ChenBeier
Thu Aug 12, 2021 8:12 am
Forum: Chemistry forum
Topic: calculation of molar fraction and pressure
Replies: 3
Views: 3835

Re: calculation of molar fraction and pressure

Consider the vessel is 8 dm^3. In this is filled 2,5 dm^3 CH4 and 4.5 dm^3 O2 . In total 7 dm^3. 1 dm^3 is missing so we have some expansion. of the gases. The two pressures are also different. p1V1 + p2V2 = ptotal* Vvessel pV ~ n. RT is constant. From this you have to get total pressure and the par...
by ChenBeier
Wed Aug 11, 2021 12:11 pm
Forum: Chemistry forum
Topic: gaseous mixtures
Replies: 6
Views: 4599

Re: gaseous mixtures

The candidate has 99 points. If you reach 100 points you get a light cookie.

But to achieve this calculation it goes faster 2,666/5 = 0,5332
And 2,333/5 = 0,4666

Because V~ n.
by ChenBeier
Wed Aug 11, 2021 6:28 am
Forum: Chemistry forum
Topic: gaseous mixtures
Replies: 6
Views: 4599

Re: gaseous mixtures

What is your result?
by ChenBeier
Tue Aug 10, 2021 11:42 am
Forum: Chemistry forum
Topic: gaseous mixtures
Replies: 6
Views: 4599

Re: gaseous mixtures

pV = nRT

P, R and T are constant so n~V

V(CH4) + V(C2H6) = 5 dm^3

2V(O2(CH4)) + 3,5V(O2(C2H6)) = 13,5 dm^2

Substitute Ethane by 5dm^3 - V(CH4) = V(C2H6)

x + y = 5
2 x + 3,5 y =13,5
by ChenBeier
Sun Aug 08, 2021 8:54 am
Forum: Chemistry forum
Topic: Purity of hydrogen obtained via brine electrolysis
Replies: 1
Views: 3037

Re: Purity of hydrogen obtained via brine electrolysis

If sulfur compounds Oxidation number lessthen +6 in the brine, then the electrolysis is a Reduction, what can create Hydrogen sulfide.