Search found 1623 matches

by expert
Sun Mar 08, 2009 12:39 pm
Forum: Chemistry forum
Topic: balanced equation
Replies: 1
Views: 1927

If you write Na2SO4 correcly, the task suddenly gets really simple.
by expert
Sun Mar 08, 2009 12:34 pm
Forum: Chemistry forum
Topic: chemical reaction
Replies: 1
Views: 2755

The most important is to figure out the structure of C7H6O6S. Although there are many possibilities, Google search points out to the most popular structure: 5-Sulfosalicylic acid http://www.jianxin-chem.cn/images/jiegoushi-1.jpg Second, it's important to know the sequence of addition, conditions (te...
by expert
Sun Mar 08, 2009 12:40 am
Forum: Chemistry forum
Topic: Help On a few things! =)
Replies: 1
Views: 1964

Mg(OH)2 + (NH4)3PO4 --> Mg3(PO4)2 + NH3 + H2O

Now put appropriate coefficients
by expert
Fri Mar 06, 2009 11:24 pm
Forum: Chemistry forum
Topic: Rust and electrical conductivity
Replies: 3
Views: 5524

No. At least not directly. Even if both electrodes were completely covered with rust, when completely exposed to water, the conductivity only depends on the surface of iron. The surface may somewhat increase due to rusting that in turn will make the surface of iron electrodes rougher. Still, the mai...
by expert
Fri Mar 06, 2009 10:59 pm
Forum: Chemistry forum
Topic: Titanium Dioxide
Replies: 1
Views: 2422

No, "di" and "bi" are not limited to covalent compounds.
by expert
Thu Mar 05, 2009 10:50 pm
Forum: Chemistry forum
Topic: Rust and electrical conductivity
Replies: 3
Views: 5524

No, but it may become much more conductive when wet.
by expert
Thu Mar 05, 2009 10:37 pm
Forum: Chemistry forum
Topic: Predicting and balencing Acid/Base chemical products.
Replies: 1
Views: 2258

You're almost right. You just missed oxygen:
H3(PO4) + CsOH -> Cs3PO4 + H2O
by expert
Wed Mar 04, 2009 2:46 pm
Forum: Chemistry forum
Topic: Why filter a Nearly Saturated Solution of Ca(OH)2
Replies: 3
Views: 4462

Nothing is wrong. Good solution, good protection from air. Leave a small amount of solution aside in a tube and you will see a solid next day.
by expert
Wed Mar 04, 2009 2:43 pm
Forum: Chemistry forum
Topic: balance equations
Replies: 1
Views: 2222

Start with molecular formula of Copper(II) Sulfate CuSO4
by expert
Tue Mar 03, 2009 10:41 pm
Forum: Chemistry forum
Topic: BaSO4 electrical properties
Replies: 1
Views: 4251

Conductivity of BaSO4 will depend entirely on moisture content. Dry BaSO4 should be a good insulator. No reference, just common sense
by expert
Tue Mar 03, 2009 10:27 pm
Forum: Chemistry forum
Topic: Need help determining and balancing an equation.
Replies: 1
Views: 1958

No way!
by expert
Tue Mar 03, 2009 10:19 pm
Forum: Chemistry forum
Topic: Help with chemical equation!!!
Replies: 1
Views: 1957

1. Find and open your chemistry book
2. Find a chemical formula for propane
3. Write reaction of combustion in oxygen with carbon dioxide and water as products
by expert
Tue Mar 03, 2009 9:59 pm
Forum: Chemistry forum
Topic: Why filter a Nearly Saturated Solution of Ca(OH)2
Replies: 3
Views: 4462

Because saturated solution of Ca(OH)2 may contain undissolved Ca(OH)2 solid (by definition of saturated solution). Additionally Ca(OH)2 is almost always contaminated with CaCO3 that formed by absorption of CO2 from air. All these solids are expected to retain on a filter paper, and the paper will be...
by expert
Tue Mar 03, 2009 9:51 pm
Forum: Chemistry forum
Topic: help me balance this equation
Replies: 1
Views: 2067

Correct:
K{3}PO{4} + Ca(NO{3}){2} = Ca{3}(PO{4}){2} + KNO{3}
by expert
Mon Mar 02, 2009 9:07 pm
Forum: Chemistry forum
Topic: Theoretical yield of balanced equation?
Replies: 3
Views: 5029

Sorry, didn't intend it as an insult, but this one is truly easy:
1. K+ + Al3+ + 2 SO4- + 12 H2O = KAl(SO4)2*12H2O
write it in a molecular form keeping proportions the same (x2):
1. K2SO4 + Al2(SO4)3 + 24 H2O = 2KAl(SO4)2*12H2O
That's it