Search found 750 matches

by ChenBeier
Tue May 04, 2021 11:44 pm
Forum: Chemistry forum
Topic: Inquiry
Replies: 1
Views: 40

Re: Inquiry

2 Pentene derivates can obtained by eliminating of HBr
by ChenBeier
Tue May 04, 2021 11:40 pm
Forum: Chemistry forum
Topic: Balancing chemical equation
Replies: 1
Views: 82

Re: Balancing chemical equation

This reaction doesnt exists. The formula of the first compound is wrong as well.
by ChenBeier
Tue May 04, 2021 2:24 am
Forum: Chemistry forum
Topic: BALANCE CHEMICAL EQUATIONS
Replies: 4
Views: 263

Re: BALANCE CHEMICAL EQUATIONS

Acid + Base gives salt + water. So it depends how much from each is added what happend. Like KOH + H3PO4 you can have 3 different results. KH2PO4, K2HPO4 and K3PO4. Ammonia gives Ammonium NH4+ Urea decompose with acids to ammonia and carbondioxide. Salt1 + acid1 gives Salt2 + acid2, in solution you ...
by ChenBeier
Mon May 03, 2021 10:59 pm
Forum: Chemistry forum
Topic: BALANCE CHEMICAL EQUATIONS
Replies: 4
Views: 263

Re: BALANCE CHEMICAL EQUATIONS

What do you expect now. Better is you write your ideas, then we can discuss.
by ChenBeier
Sat May 01, 2021 7:26 am
Forum: Chemistry forum
Topic: Titration and pH computation
Replies: 17
Views: 272

Re: Titration and pH computation

Looks good now. Before you got 6.1
by ChenBeier
Fri Apr 30, 2021 12:12 pm
Forum: Chemistry forum
Topic: Titration and pH computation
Replies: 17
Views: 272

Re: Titration and pH computation

Please show the total calculation. I dont have the time to recalculate everything.
by ChenBeier
Fri Apr 30, 2021 12:10 pm
Forum: Chemistry forum
Topic: Mineral oil/Alkalis
Replies: 3
Views: 79

Re: Mineral oil/Alkalis

It is called petroleum ether. Chemical Isohexane.
by ChenBeier
Fri Apr 30, 2021 12:55 am
Forum: Chemistry forum
Topic: Acid-Base Titrations
Replies: 3
Views: 87

Re: Acid-Base Titrations

It means HInd. => H+ + Ind.- if 10% is on the right side its colourless, if the dissociation is 90 % then its yellow.
It is a change from 10 Ind.- to 90 HInd. to 90Ind.- to 10 HInd.

Develop K =
by ChenBeier
Fri Apr 30, 2021 12:35 am
Forum: Chemistry forum
Topic: Mineral oil/Alkalis
Replies: 3
Views: 79

Re: Mineral oil/Alkalis

What do you mean with alkali storage. Mineral oil is a mixture of carbonhydogen compounds. Depending the area USA Arabia northsea, etc. the mixture is different.
by ChenBeier
Fri Apr 30, 2021 12:32 am
Forum: Chemistry forum
Topic: Titration and pH computation
Replies: 17
Views: 272

Re: Titration and pH computation

Show your calculation. At midpoint its wrong. HCl is not the point, which acid we are dealing with.
by ChenBeier
Fri Apr 30, 2021 12:29 am
Forum: Chemistry forum
Topic: Acid-Base Titrations
Replies: 3
Views: 87

Re: Acid-Base Titrations

What your ideas. What is the dissociation equation?
by ChenBeier
Thu Apr 29, 2021 12:32 am
Forum: Chemistry forum
Topic: Titration and pH computation
Replies: 17
Views: 272

Re: Titration and pH computation

No, its a weak base so you have to calculate with HENDERSON Hasselbalch equation.
by ChenBeier
Wed Apr 28, 2021 8:28 am
Forum: Chemistry forum
Topic: Titration and pH computation
Replies: 17
Views: 272

Re: Titration and pH computation

Now its correct. What is your opinion to trifluorine acetic acid.
by ChenBeier
Wed Apr 28, 2021 7:28 am
Forum: Chemistry forum
Topic: Titration and pH computation
Replies: 17
Views: 272

Re: Titration and pH computation

a) is now wrong, why you changed to 0,00525
You have 50 ml + 25 ml = 75 ml = 0,075 l
b) is wrong too
by ChenBeier
Wed Apr 28, 2021 3:04 am
Forum: Chemistry forum
Topic: Definition of equivalent weight
Replies: 1
Views: 64

Re: Definition of equivalent weight

Yes it is. It guides from molarity to normality or equivalent concentration.
Compare HCl and H2SO4 , if neutralised with 1 M NaOH.