Chemistry - November 2007

Because thioglycolic acid is diprotic (it has two H+ to donate) am I right in assuming that its redox potential is dependent on pH even though the half reaction does not have H+ or OH- transfer when it is reducing?

2007-11-23 01:12:26 · 2 answers · asked by Anonymous

Does anyone know what the redox half reaction equation is when thioglycolic acid (HS-CH2-CO2H) is acting as a reducing agent? And is the reaction dependent on what is being reduced?

Thanks

2007-11-23 00:27:32 · 1 answers · asked by Anonymous

can zinc chloride or zinc sulphate used as electrolyte in the voltaic cell in order to determine the potential difference between two different metal that act as electrode......the electrode used is cooper and zinc?????

2007-11-22 22:52:39 · 1 answers · asked by Daireen 2

problem....

A chemist burns 0.8650g of graphite (a form of carbon) in a new bomb calorimeter, COsub2 forms. If 393.5 kJ of heat is released per mole of graphite and T increases 2.613K, what is the heat capacity of the bomb calorimeter....

please give a solution...
thank you....

2007-11-22 21:57:19 · 1 answers · asked by bench 1

[yes no] Is Fe2+(aq) capable of reducing Sn2+(aq) to Sn metal?
[ yes no] Is Cr3+(aq) capable of oxidizing Fe2+(aq)?
[yes no] Is Fe2+(aq) capable of reducing Cr3+(aq) to Cr2+(aq)?
[yes no] Is Cr metal capable of reducing Fe2+(aq)?
[yes no] Is Ni2+(aq) capable of oxidizing H2(g)?
[yes no] Is H2(g) capable of reducing Ag+(aq)?

2007-11-22 21:41:14 · 1 answers · asked by estranged 1

Say the bomb vessel is meant to be charged to 30 bar and you charge it to 20 bar with pure oxygen, will this affect the calibration of the bomb vessel? (Will your result still be valid assuming the sample does burn up completely.)

2007-11-22 21:00:12 · 1 answers · asked by Anonymous

2007-11-22 17:42:15 · 13 answers · asked by Anonymous

2007-11-22 17:40:38 · 6 answers · asked by Anonymous

What is the auto-ignition temperature of biodiesel.
I really need it.

2007-11-22 17:26:36 · 1 answers · asked by Anonymous

calculate the number of molecules in each of the following

71.0 g of Cl gas

40 g of water

4.0 of oxygen gas

132g of C2F2H4

can you show your work and teach me how to do it, write it so its easy to read and easy for a little kid to learn =)

thanks in advance

2007-11-22 15:13:17 · 2 answers · asked by Anonymous

A 42 year old male, who inherited a Radioactive Substance into his
body, from his father, who was in WWII, received an injection of
Nucleur Dye, for a ''treadmill test''.
Complications happened. He survived.
I want to know if anyone knows about Chemicals, to know how these
two substance can React to Each Other...and to What Degree.
It can be fatal, can't it?
Too Funny

2007-11-22 15:05:25 · 2 answers · asked by Too Funny 3

What is partial pressure of Ne Thanks and God Bless

2007-11-22 14:47:10 · 1 answers · asked by HisGlory 1

SO2, CO, CF4, OR H20? How can I tell?

2007-11-22 14:30:42 · 4 answers · asked by People J 2

does anyone know anyhing about baking soda and human ph levels.
also, about the water alkaline machines?

2007-11-22 14:30:41 · 1 answers · asked by houstonretina 1

In regards to the mono-chlorination of 2,2-dimethylbutane

2007-11-22 14:16:37 · 1 answers · asked by Anonymous

2007-11-22 14:15:52 · 1 answers · asked by olarewaju michael 1

In regards to the mono-chlorination of 2,2-dimethylbutane

2007-11-22 14:15:13 · 1 answers · asked by Anonymous

If so, can carbon be added, safely?

2007-11-22 14:14:37 · 2 answers · asked by Anonymous

Water is H2o, is the froth, the gaining or losing of a molecule?

2007-11-22 14:02:51 · 1 answers · asked by Anonymous

Acetyl chloride (C2 H3 CLO). What mass of aspirin is produced by the reaction of 40.0g of Salicylic acid and 30.0g of acteyl chloride
C7 H6 O3 + C2 H3 CLO ----> C9 H8 O4 + HCL

2007-11-22 13:57:55 · 2 answers · asked by jamie d 2

2007-11-22 13:36:55 · 2 answers · asked by Salvador 2

In need of chemistry help... again... these problems are complicated. How exactly can you find the empirical formula WITHOUT percentage?

A 3.62g sample of a compound containing C, H, and O only burned in air and made 5.19g of CO2 and 2.83g of H2O. What is the empirical formula of the compound?

---AND---

Potassium persulfate is a chemical used for photodeveloping. By mass, potassium persulfate has 28.9% potassium, 23.7% sulfur and the rest is oxygen. What is the empirical formula of this compound?

2007-11-22 13:15:59 · 2 answers · asked by mikita_daita 1

2007-11-22 12:37:48 · 3 answers · asked by Connie H 1

which substance has the greatest molecular mass? A)H202 B)NO C)CF4 D)I2

AND PLEASE EXPLAIN HOW U GOT THE ANSWER!!!

2007-11-22 12:29:17 · 1 answers · asked by Anonymous

2007-11-22 12:05:25 · 2 answers · asked by Anonymous

2007-11-22 12:03:36 · 3 answers · asked by Salvador 2

2007-11-22 11:45:41 · 2 answers · asked by Connie H 1

Can someone please tell me the mass % of Copper(I)Sulfide and Copper(II)Sulfide? Please explain how you got your answer.

2007-11-22 11:43:28 · 2 answers · asked by lovebug 2

Hey guys, I have a few questions for a lab report I'm doing, any help or answers to any or all questions would be really appreciated:

What is the scientific name for vinegar?

What is the chemical formula for binegar?

What type of compound is vinegar?

What is the scientific name for the active ingredient in Alka-Seltzer?

What is the chemical formula for the active ingredient in Alka-Seltzer?

What type of compound is the active ingredient in Alka-Seltzer?

What is the equation for the reaction being observed? (balanced equation would be best)

What type of reaction is taking place?


All your help is really greatly appreciated, I'll be doing my own research on these questions and waiting for your responses, thanks guys.

2007-11-22 11:23:54 · 2 answers · asked by Anonymous

C2H4Cl2 + O2 => CO2 +H2O +HCl


I know that I start like this...
C2H4Cl2 + O2 => 2CO2 + H2O + HCl

but how do you know where to go from there?
also how do you know when to double your results?
Please inform me on how to do these type of problems thank you

2007-11-22 11:17:24 · 1 answers · asked by Anonymous