Science & Mathematics - 8 October 2006

Ok so i have to do this titration problem and its really complicated!! If you could help me on any part of this, it will be good help!

A 50 ml solution of oxalic acid (H2C2O4) requires 24.35 ml of 0.125 M NaOH to neutralize both protons. It takes 15.83 ml of KMnO4 (Product Mn^+2) to react with all the oxalic acid in another 50 ml sample of oxalic acid (product CO2). A 2.5 g sample containing Iron II chloride is dissolbed in acid and titrated with 31.87 mL of the KMnO4 solution.

a) write three balanced equations for the reactions
b) Whcih compounds are the reducing agents and which are the oxidizing agents?
c) What is the concentration of thte permanganate solution in this problem?
d) what is the percentage of iron in the solid sample?

If could get the 3 balanced reactions i could try to work it out.
the first one i got H2C2O4+2NaOH-->2H2O + Na2C2O4
the next one is KMnO4+H2C2O4--> ?? is it CO2 + Mn^(+2)?? idk
last 1 : FeCl2+ KMnO4 --> Fe(MnO4)2 + KCl
are these right?

2006-10-08 08:26:03 · 2 answers · asked by Anonymous in Chemistry

1 ⤊

Is it possible to use the space sattelite technology to pinpoint an individual on earth and send a laser beam?

2006-10-08 08:25:55 · 4 answers · asked by stvenryn 4 in Engineering

0 ⤊

which diamond schools do we have in the world?

2006-10-08 08:25:49 · 3 answers · asked by Anonymous in Earth Sciences & Geology

0 ⤊

What causes an object to undergo length contraction as it moves nearer and nearer to light speed?

2006-10-08 08:25:32 · 4 answers · asked by Anonymous in Physics

0 ⤊

problem on solving for area and mass stuff.?

can somone solve this and explain in general how to do these types of problem?
Q: the aluminum foil on a certain roll has a total area of 18.5 square meter and a mass of 1275g. using a density of 2.7g per cubic centimeter for aluminum, determine the thickness of the alumium in milimeters.

2006-10-08 08:24:50 · 2 answers · asked by debbie 2 in Mathematics

3 ⤊

how does the man that drives the snow plough get to work?

2006-10-08 08:24:34 · 19 answers · asked by forapound 1 in Physics

70 ⤊

what is the freezing point for fermium?

what is the freezing point for the element fermium?

2006-10-08 08:18:51 · 3 answers · asked by christine w 1 in Chemistry

1 ⤊

How long ago did the homosapien race begin.?

2006-10-08 08:18:29 · 9 answers · asked by Dave 3 in Biology

2 ⤊

How do moons stay in orbit around Jupiter?

2006-10-08 08:14:18 · 14 answers · asked by cool r 1 in Astronomy & Space

1 ⤊

what will happen when you mix sodium (na) and water together?

science experiment

2006-10-08 08:14:05 · 10 answers · asked by Emily Rose 2 in Physics

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how are christaMcauliffe and mae jemison alike?

they are astronauts

2006-10-08 08:13:35 · 2 answers · asked by Anonymous in Astronomy & Space

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If you were to dig a hole an sit in it, would you weigh more then the people above you?

Since of course, you would normally think that gravity increases as you get closer to the center of the earth. But why does gravity increase as you get closer to the center/core, since-------

Gravity and the size of the planet are realted.
For example Jupiter has more gravity then earth because it is bigger, so therefore the smaller the planet the less the gravity, when you dig a whole should'nt there be less gravity since there is less mass underneath you?
Any website covering the problem would be great, or even a opinion.
I need something to work off of, for a theory.

2006-10-08 08:12:07 · 9 answers · asked by Fireball 2 in Astronomy & Space

0 ⤊

Is hydrogen energy inexhaustible?

Is it? I think so, but I'm not 100% sure.

2006-10-08 08:10:52 · 3 answers · asked by Chris 2 in Earth Sciences & Geology

4 ⤊

What do you think will be the biggest breakthrough in science for the next century ?

2006-10-08 08:10:28 · 14 answers · asked by Deloused-In-The-Comatorium 3 in Other - Science

1 ⤊

Do you know how many starts there are in the space? How do you?

2006-10-08 08:09:58 · 5 answers · asked by Bambino07 2 in Astronomy & Space

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how do i find the distance from the point (1,0,2) to the line of intersection of two planes?

the two planes are: x+y-2z +1 = 0 and 2x-y-2z-1=0. i know that you need to find the intersection and i can go on from there but how can you figure out the intersecting line if you have three unknowns and only two equations? yeah well please if u kow u can help please do. thanks in advance.

2006-10-08 08:08:42 · 4 answers · asked by cuervo 1 in Mathematics

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What is the difference between: antibody, antibiotic, antigene, vaccine, and serum? please help?

Please provide me with a clear answer, which is not very long as well.. thanks alot in advance

2006-10-08 08:07:03 · 4 answers · asked by malaysia 2 in Biology

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What would happen if a healthy person took thyroxin pills?

a. The level of TSH in the blood would increase
b. the output of TSH-RF (TSH-RH) would increase
c. The thyroid would increase it's activity
d. There would be an increase in metabolic activity of body cells, but negative feedback would shut down the thyroid
e. none of the above

2006-10-08 08:06:35 · 3 answers · asked by girlsidra 1 in Biology

0 ⤊

what is the atmosphere for mercury?

2006-10-08 08:04:36 · 4 answers · asked by Anonymous in Astronomy & Space

0 ⤊

Cartridge primers are used in reloading. What is the difference between "small caliber" and "large caliber"?

Reloading manuals distinguish between "large caliber" pistol and "small caliber" pistol primers. What is the size caliber breaking point between "large" and "small"?

2006-10-08 07:57:36 · 1 answers · asked by Terry 1 in Mathematics

2 ⤊

factorize 64x^6 - 49y^4?

2006-10-08 07:54:44 · 5 answers · asked by Anonymous in Mathematics

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How do I write the equation "x works twice as fast as y" ?

2006-10-08 07:54:38 · 8 answers · asked by roger 1 in Mathematics