Search found 53 matches

by Sam
Thu Aug 07, 2008 12:45 pm
Forum: Chemistry forum
Topic: TOXIC!!!!
Replies: 3
Views: 4862

Use ethanol
by Sam
Tue Apr 22, 2008 7:56 am
Forum: Chemistry forum
Topic: science fair help! equations.
Replies: 1
Views: 8652

Re: science fair help! equations.

1. NaHSO4 + Al(OH)3 = NaOH + AlSO4 + H2 That is not correct. NaHSO4 + Al(OH)3 = Na2SO4 + Al2(SO4)3 + H2O Use balancer to balance this equation: http://www.webqc.org/balance.php 2. What would be a good chemical formula for whole milk? Milk is not a one compound - it's a mixture of many: water, fats,...
by Sam
Wed Mar 05, 2008 9:11 am
Forum: Chemistry forum
Topic: I NEED HELP!!!!!!!!!!
Replies: 1
Views: 3901

Was it in a acidic environment?
If so, here is what happened:

Code: Select all

2 KMnO4 + 10 FeSO4 + 8 H2SO4 = K2SO4 + 2 MnSO4 + 5 Fe2(SO4)3 + 8 H2O
http://www.webqc.org/balance.php?reacti ... %293%2BH2O
by Sam
Wed Mar 05, 2008 9:08 am
Forum: Chemistry forum
Topic: Equation, please (MoS2 + H2O2)
Replies: 1
Views: 4254

Re: Equation, please (MoS2 + H2O2)

We test some medical device using MoS2 and H2O2, but something was happened. two chemicals were vigrously reacted with heat, like a hot-spring. and now we got confirmed SO4 on ion chromatography. however, unfortunately, my major is not chemistry, and then i have no idea what the equation is. Please...
by Sam
Thu Dec 06, 2007 11:46 pm
Forum: Chemistry forum
Topic: PLease assist with tricky balancing...
Replies: 3
Views: 5679

Re: Uh...

No, she specifically told us that it is not H2O .... It's confusing... I'm gonna die :lol: I'll insist that it must be H2O, there is absolutely no way H2 could be produced in such a reaction (due to the fact that Cl2 is a strong oxidizing agent). Tell your teacher about this thread(forum) - I am re...
by Sam
Thu Dec 06, 2007 10:38 pm
Forum: Chemistry forum
Topic: HELP!!
Replies: 1
Views: 6747

Re: HELP!!

Please help!! I need to balance this chemical equation and I don't have a clue. Could someone balance this and explain it to me? The equation is H2SO4+B(OH)3+B2(SO4)3+H2O Lisa You must have an equality sign in your equation. Here it is balanced: 3 H2SO4 + 2 B(OH)3 = B2(SO4&a...
by Sam
Thu Dec 06, 2007 10:36 pm
Forum: Chemistry forum
Topic: Balance this redox...Help
Replies: 1
Views: 4003

Re: Balance this redox...Help

KMnO4 + SO2 + H2(SO)4 = Mn(SO)4 + K2(SO)4 + H2(SO)4 First of all do not put parenthesis everywhere. H2(SO)4 is the same as H2S4O4 which is a mistake! It must be H2SO4. Also you should have water on the left: KMnO4 + SO2 + H2O = MnSO4 + K2SO4 + H2SO4 That is balanced without any problem by chemical ...
by Sam
Thu Dec 06, 2007 10:31 pm
Forum: Chemistry forum
Topic: PLease assist with tricky balancing...
Replies: 3
Views: 5679

Re: PLease assist with tricky balancing...

I'm having some real trouble with a tricky problem on a worksheet we got in my high school Chem class, if anyone could shine some light on my problem, I would be really interested to know how to solve this. :?: The Balancing Calculator on this same site says that some of the chemicals have coeffici...
by Sam
Wed Nov 14, 2007 10:28 am
Forum: Chemistry forum
Topic: chem
Replies: 1
Views: 3472

Re: chem

JamiePena wrote:write a chemical symbol and english name of an element in period 3 which is a gas at room temperature.
There are two elements which fits the answer!
Chlorine Cl http://www.webqc.org/periodictable-Chlorine-Cl.html
and
Argon Ar http://www.webqc.org/periodictable-Argon-Ar.html
by Sam
Wed Nov 14, 2007 10:25 am
Forum: Chemistry forum
Topic: Iodiometric Analysis of Sodium Peroxoborate
Replies: 1
Views: 14220

Re: Iodiometric Analysis of Sodium Peroxoborate

Please help!! Iodometric Analysis of Sodium Peroxoborate - can't find the equations anywhere!! (1) Sodium Peroxoborate + Potassium Iodide + Sulphuric Acid = ?????? (2) Product from equation 1 + Sodium Thiosulfaye = ?????? HELLLLLP!! (Due tomorrow afternoon!) (1) Na2[B2(OH)4&...
by Sam
Wed Nov 14, 2007 10:16 am
Forum: Chemistry forum
Topic: pH
Replies: 1
Views: 3508

Re: pH

gwda wrote:Why are there so few foods with a pH greater then 7?
Thanks.
Because most foods contain organic acids which has pH lower than 7.
by Sam
Wed Nov 14, 2007 10:15 am
Forum: Chemistry forum
Topic: excited electrons
Replies: 1
Views: 12985

Re: excited electrons

tropicalwaters wrote:what is the excited electron configuration of a sulfur atom? and how would the orbital diagram look like?
In ground state sulfur has:
1s2 2s2 2p6 3s2 3p4
If you promote an electron to a higher orbital it will give you an excited state, for example:
1s2 2s2 2p6 3s2 3p3 3d1
by Sam
Wed Nov 14, 2007 10:12 am
Forum: Chemistry forum
Topic: [Help req.] Balancing redox reaction equations
Replies: 4
Views: 5297

Noff wrote:Is there no way to balance the original equations without the additions?

Thanks by the way.
Yes, that is absolutely impossible.
A simple poof is to look at charges: they have different sign on both sides in original equations. Therefore whatever coefficients you choose charge will not be balanced!
by Sam
Wed Nov 14, 2007 10:09 am
Forum: Chemistry forum
Topic: What makes NaNO2 a strong electron acceptor?
Replies: 1
Views: 3535

Re: What makes NaNO2 a strong electron acceptor?

Just wondering why sodium nitrite is a stronger electron acceptor than sodium nitrate? When metronidazole is given to treat bacterial infections, it accepts electrons from them and in exchange gives them an oxygen. When you add in sodium nitrite it inhibits the function of metronidazole accepts an ...
by Sam
Mon Oct 29, 2007 12:11 am
Forum: Chemistry forum
Topic: impossible equations?
Replies: 1
Views: 6485

In fact it is impossible! Because P is oxidized (P2O3->phosphate) and nothing is reduced!
You either had P2O5 and it turned to a phosphate (e.g. K2HPO4) or
you had P2O3 which turns to a phosphite that is K2HPO3.
Hope that explains this issue.