I have a problem in which I must separate 3 different types of metal ions from a solution using precipitation, Can anyone offer any ideas about how to go about doing this? I have considered introducing metals that are higher in the activity series (they are all considered very low and insoluble, I have also considered introducing compounds of these substances that are soluble. Truth is, I really have no idea. If someone could set me on the right path it would be very appreciated!!!

Thanks!

PF3 + (CH3)2S ------>

Thanks!

If some could help me with these problems i would really appreciate it. Thanks

1)
Balance the following reaction using oxidation numbers:
K2Cr2O7 (aq) + HI (aq) -> KI (aq) + CrI3 (aq) + I2 (s) + H2O (l)
Items required:
- oxidation numbers; bridges connecting oxidation and reduction ½ reaction
- electrons equalized with visible factors
- reaction partially balanced with oxidation numbers
- reaction fully balanced via visual inspection

2)
Describe completely the galvanic cell based on the following reaction under standard conditions:
MnO4-(aq) + I-(aq) -> I2(s) + Mn 2+(aq)

Illustrate how elements are utilized in the human body and in industry?

Can someone please help me answer this question from my saponification lab:

Assuming a soap to be pure sodium stearate, give an equation for each of the following:
a)showing why its solutions are alkaline

b)its reaction with Ca2+ in hard water

c)its reaction with hydrochloric acid

Thanks!

the question is;

in an equilibrium mixture of reactants and products at 400 degrees celsius,in a steel vessel with volume 10 dm cube,there were 2.0 mol of ammonia,5.5 mol of nitrogen and 5.0 mol 0f hydrogen.

calculate equilibrium constant at this temperature?

I Need Help

Write equations to describe the following nuclear decay reaction processes

a)the a-particle decay of (Po)
b)the β- - particle decay of (Sn)
c)the β+ - decay of (Na)
d)electron capture by (K)
e) the decay of Np and its daughters with successive emission of a -, β- - and a-particles.

Thank you to anyone

How do you find the number of neutrons if you know the number of electrons?

==================================================================

Environmental Pollution and Public Health (EPPH 2009),
Special Track within iCBBE2009
Call for Papers
http://www.icbbe.org/epph
Beijing, China, June 11-13, 2009
==================================================================
This special track EPPH is part of the third international conference
on Bioinformatics and Biomedical Engineering (iCBBE2009). EPPH2009
focuses on the relationship between environmental pollutions and human

Ok I am in AP Chemistry 2 and I have no clue what I am doing... so can someone help me with this problem??

Hexamethylenetetramine was used for the treatment of kidney and bladder infections prior to the development of modern antibiotic drugs. Combustion of 0.2897 g of this compound produced 0.5456 g of CO2 and ).2234 g of H2O. Separate nitrogen assay of a 0.3801 g sample yielded 0.1848 g of ammonia. What is the empirical formula of this compound?