Search found 1563 matches

by ChenBeier
Tue Aug 02, 2022 9:12 am
Forum: Chemistry forum
Topic: Predicting products of a chemical reaction
Replies: 1
Views: 1047

Re: Predicting products of a chemical reaction

I dont think this will work

Check here

https://en.m.wikipedia.org/wiki/Silicon_nitride

The reaction runs in absence of Oxygen.
by ChenBeier
Sun Jul 24, 2022 1:53 am
Forum: Chemistry forum
Topic: AP Chem help needed
Replies: 1
Views: 1032

Re: AP Chem help needed

a. The given equation is not balanced. Also charges are missing. Tipp: in neutral solution Oxidation is done by Adding of OH- and gaining H2O .The reduction is vise versa. If you have the right equation read how many mol H2O2 correspond to Permanganat. Your mixture is equimolar! b. Use molar volume ...
by ChenBeier
Sat Jul 09, 2022 3:42 pm
Forum: Chemistry forum
Topic: I need help for this reactions
Replies: 11
Views: 5049

Re: I need help for this reactions

About 20-50 g/l H2SO4, 5-8 g/l NaCl and 30-40 ml/l H2O2 30% or 50 - 70 g/l Na2S2O8, Temperature 50 - 60 °C ,
Stirring or air agitation
by ChenBeier
Sat Jul 09, 2022 9:25 am
Forum: Chemistry forum
Topic: Please help with analytical chemistry
Replies: 1
Views: 1066

Re: Please help with analytical chemistry

Calculate the mole of Chrome trichloride hexa hydrate by using molar mass. This is equal of moles of Chrome III. This is dissolved in 250 ml. An aliquot 21.3 ml was taken. How much moles correspond to it and diluted to 50 ml. Get the concentration for it. In my knowledge EDTA make a 1:1 COMPLEX. May...
by ChenBeier
Sat Jul 09, 2022 9:06 am
Forum: Chemistry forum
Topic: I need help for this reactions
Replies: 11
Views: 5049

Re: I need help for this reactions

This shows only a dissolving of the stem over 10 days, there is no crystalisation. This can be done with sulfuric acid /peroxide in some hours
by ChenBeier
Sat Jul 09, 2022 7:18 am
Forum: Chemistry forum
Topic: I need help for this reactions
Replies: 11
Views: 5049

Re: I need help for this reactions

To 1. You have not the right tool mechanically and also not the right chemical. It is impossible to do in this way. To 2. The recation what you wrote goes in opposit direction. Al(OH)3 + KHSO4 + H2SO4→AlK(SO4)2 + 3H2O and AlK(SO4)2 →Al 3+ + K+ + 2 SO4 2-, that is the dissociation I told before. The ...
by ChenBeier
Fri Jul 08, 2022 10:25 pm
Forum: Chemistry forum
Topic: I need help for this reactions
Replies: 11
Views: 5049

Re: I need help for this reactions

Why should it happen. 1. What is your purpose or benefit for it? 2. On the other hand alum is the wrong chemical to obtain it. Alum is a salt what only dissociate in water, like other salt do, there is no sulfuric acid or other compounds. 3. The steel can only dissolved with hydrochloric or sulfuric...
by ChenBeier
Tue Jul 05, 2022 2:52 am
Forum: Chemistry forum
Topic: organic chemistry
Replies: 5
Views: 2754

Re: organic chemistry

What did you found on mcqs360? Which answer is correct or incorrect?
by ChenBeier
Thu Jun 30, 2022 8:05 am
Forum: Chemistry forum
Topic: Please help!
Replies: 1
Views: 1250

Re: Please help!

1. Get from all the compounds the molar Masses, check PSE for this. 2. Write down the correct balanced chemical equation 3. From the given masses calculated the moles by using n=m/M 4. Then do comparison how many moles hydrochloric correspond to how many moles magnesium chloride. 5. How this number ...
by ChenBeier
Tue Jun 28, 2022 2:29 pm
Forum: Chemistry forum
Topic: salt
Replies: 1
Views: 1167

Re: salt

Every Substance has some characteristics. So there are healthy ones and others are unhealthy or poison. And also the taste buds react different, like sweet, spicy, salt, bitter, etc.
Its the matter how the human bring was built up .
by ChenBeier
Mon Jun 27, 2022 7:44 am
Forum: Chemistry forum
Topic: How to calculate Cp of High entropy ceramics composites
Replies: 6
Views: 1847

Re: How to calculate Cp of High entropy ceramics composites

I dont see calculation for mass fraction. You used mole fraction, do you?
Take maybe 1 g of the ceramic and calculate the grams of each oxide by using molar mass.
by ChenBeier
Mon Jun 27, 2022 4:35 am
Forum: Chemistry forum
Topic: How to calculate Cp of High entropy ceramics composites
Replies: 6
Views: 1847

Re: How to calculate Cp of High entropy ceramics composites

The method is valid at 25°C, at other temperature it differs.
Get the right mass fraction? What kind of Oxides you have?
by ChenBeier
Mon Jun 27, 2022 4:20 am
Forum: Chemistry forum
Topic: How to calculate Cp of High entropy ceramics composites
Replies: 6
Views: 1847

Re: How to calculate Cp of High entropy ceramics composites

You need the specific heat capacity of each component in your ceramic and the mass fraction of each component.
The Neumann Kopp law is here

https://en.m.wikipedia.org/wiki/Kopp%27s_law
by ChenBeier
Sat Jun 25, 2022 9:28 am
Forum: Chemistry forum
Topic: Chemical formula and material nameفرمول شیمیایی و نام مواد
Replies: 1
Views: 1103

Re: فرمول شیمیایی و نام مواد

We cannot read Arabien language, so Itranslated it.
Ammonium nitrate and ammonia gives a buffer. There is no reaction. Calculation with Henderson Hasselbalch equation.
by ChenBeier
Wed Jun 22, 2022 1:24 am
Forum: Chemistry forum
Topic: Wastewater treatment
Replies: 1
Views: 1126

Re: Wastewater treatment

Probably the oxides or sulfate of Ce and Zr.

https://scholar.google.de/scholar?q=Pho ... i=scholart