Search found 1210 matches

by ChenBeier
Tue Dec 06, 2022 7:19 am
Forum: Chemistry forum
Topic: How to make %CO2 solution with Na2CO3 based on its stoichiometric relation & solubility?
Replies: 8
Views: 28

Re: How to make %CO2 solution with Na2CO3 based on its stoichiometric relation & solubility?

The link don't go in detail, like make up of solutions etc.
Fact is that the calculation was wrong. The CO2 is developed or use by biology process, so I have no idea
by ChenBeier
Tue Dec 06, 2022 2:39 am
Forum: Chemistry forum
Topic: How to make %CO2 solution with Na2CO3 based on its stoichiometric relation & solubility?
Replies: 8
Views: 28

Re: How to make %CO2 solution with Na2CO3 based on its stoichiometric relation & solubility?

which means 0.528 g of CO2 in 1000ml since per liter is mentioned... is equivalent to 5g in 100ml. That is wrong. You have 0,5 g in 1000 ml. Now you take 1/10 means 100 ml out of the Container then you have also 1/10 of mass what is 0,05g in 100ml and not 5g. Or 0,5/1000 = 0,05/100 = 0,0005 or in p...
by ChenBeier
Mon Dec 05, 2022 11:52 pm
Forum: Chemistry forum
Topic: How to make %CO2 solution with Na2CO3 based on its stoichiometric relation & solubility?
Replies: 8
Views: 28

Re: How to make %CO2 solution with Na2CO3 based on its stoichiometric relation & solubility?

1 mol Na2CO3 = 1 mol CO2 1,3 g /106 g/ mol = 0,012 mol Na2CO3 this correspond multiplied with 44 g/ mol to 0,528 g CO2 . 0,528g/1000 g = 0,000523 This solution is only 0,053%. I think you have to dissolve 100 times more Na2CO3. But the limit is 217 g/ l because of soloubility. So 50 % is not possible.
by ChenBeier
Mon Dec 05, 2022 2:32 am
Forum: Chemistry forum
Topic: Balancing equations (please help us)
Replies: 1
Views: 33

Re: Balancing equations (please help us)

To less information. If it should be burnt then Co2O3, CO2 and H2O will be left. If there will be an oxidation at the alkyne, its to special. Probably it will be cut to aldehyde or carbonic acid.
by ChenBeier
Sat Dec 03, 2022 2:06 am
Forum: Chemistry forum
Topic: Balancing equation for theoretical yield
Replies: 1
Views: 42

Re: Balancing equation for theoretical yield

Acetonitril is only solvent. It will not react. Theoretical yield is normaly 100%.
Practical yield is ;

Let say you make of 5 g of a educt 10 g product that is equal 100%
But in the Experiment you dind only 8 g so the yield is 8g/10g * 100% = 80%
by ChenBeier
Thu Dec 01, 2022 8:47 am
Forum: Chemistry forum
Topic: Balancing Equations
Replies: 3
Views: 165

Re: Balancing Equations

Its correct, but the original Poster should answer it.
by ChenBeier
Wed Nov 30, 2022 1:21 am
Forum: Chemistry forum
Topic: Balancing Equations
Replies: 3
Views: 165

Re: Balancing Equations

Can you calculate. 9-6 =? Express the result as O2.
by ChenBeier
Tue Nov 29, 2022 7:52 am
Forum: Chemistry forum
Topic: Balancing equations (pls help)
Replies: 1
Views: 75

Re: Balancing equations (pls help)

Fe(OH)2NO3+HNO3=Fe(NO3)2+H2O wrong
Fe(OH)2NO3+ 2 HNO3=Fe(NO3)3 + 2 H2O

H2SO4+K2SO4=K(SO4)2+H2 wrong
H2SO4+K2SO4= 2 KHSO4

N2O5 (excess) + NaOH =??
N2O5 (excess) + NaOH => NaNO3 + HNO3

SO3+HCl (less) =??
SO3 + HCl => ClSO3H
by ChenBeier
Fri Nov 25, 2022 10:28 am
Forum: Chemistry forum
Topic: Confusion over Electrolysis and Conventional current.
Replies: 4
Views: 80

Re: Confusion over Electrolysis and Conventional current.

You have only to know current is the flow of electrons in an electrical field. They are negative charged and travel from minus to plus. The Anode is the place where the oxidation takes place and the cathode is the reduction place. In electronics or electric the current flow from plus to minus. Not m...
by ChenBeier
Fri Nov 25, 2022 5:29 am
Forum: Chemistry forum
Topic: Confusion over Electrolysis and Conventional current.
Replies: 4
Views: 80

Re: Confusion over Electrolysis and Conventional current.

First electrons are negatively charged and they will travel from a negative point to a positive one. So in an electrolysis the negative point is called cathode, the positive point is called Anode. The Anode is everytime the point where the oxidation chemically takes place. So in the case of molten N...
by ChenBeier
Mon Nov 21, 2022 12:25 pm
Forum: Chemistry forum
Topic: Doubt chemical cr2032 battery
Replies: 1
Views: 67

Re: Doubt chemical cr2032 battery

It was discussed already in the other Forums.

Dangerous compounds are LiPF6 and others, what can leak out.
by ChenBeier
Mon Nov 21, 2022 2:51 am
Forum: Chemistry forum
Topic: Preparation of javel water from NaCl
Replies: 3
Views: 86

Re: Preparation of javel water from NaCl

That is a total different thing. That is a method to develop chlorine.
The writer ask to make NaOCl. You used it and not made it.
by ChenBeier
Sun Nov 20, 2022 8:55 am
Forum: Chemistry forum
Topic: Preparation of javel water from NaCl
Replies: 3
Views: 86

Re: Preparation of javel water from NaCl

You have to combine NaOH and Cl2 Chlorine.
This can be obtained by electrolysis of NaCl. Need good stirring.

2NaCl + 2 H2O => H2( cat.) + Cl2 (anode) + 2 NaOH

2 NaOH + Cl2 => NaOCl + NaCl + H2O
by ChenBeier
Mon Nov 07, 2022 12:00 pm
Forum: Chemistry forum
Topic: What happen when polypropylene becomes brittle?
Replies: 1
Views: 130

Re: What happen when polypropylene becomes brittle?

Polypropylen should not be used below 0°C. It will crack and bigger and smaller particles also powder will be developed.
In comparison Polyethylen can go down to - 40°C. So 3xchange the Containers for safety reason.