Chemistry Help HERE ONLY !!

[twilight]

another question ..

Name 2 ways of obtaining hydrogen (on a large scale)?

Wah do you mean? obtaining hydrogen from.....

i mean how would u obtain a large quaantity of hydrogen ?

and who the hell told u he has a ghost writer (pure bullshit)

by electrolysis of acidified water

[Mastermind]

Another Question:
How do you purify copper using electrolysis?

[nid404]

Extraction of Copper - Purification.
The anode is a block of impure copper.
The cathode is a thin piece of pure copper

When electricity is passed through the cell
copper is dissolved at the anode by oxidation, Cu2+ ions go into solution.

Cu(s)  -  2e-       Cu2+(aq)

At the cathode, copper is deposited by reduction.

Cu2+(aq)  +  2e-       Cu(s)

As copper ions move from the anode to the cathode
the anode gets smaller as the cathode gets bigger.
This is a redox reaction.

The rate at which the copper ions enter the electrolyte from the anode
is the same as the rate at which the copper ions
leave the electrolyte at the cathode. The concentration of
the copper(II) sulfate solution therefore remains unchanged
As copper is transferred from the anode to the cathode
any soluble impurities in the copper anode
dissolve in the copper(II) sulfate and are removed later.

Insoluble impurities fall to the bottom of the cell and form a sludge.
The sludge often contains precious metals (silver and platinum)
which are extracted and refined.

hope this is fine

[xTremep]

Which is more reactive Gold(Au) or Platinum(Pt)?

[unknown 101]

Which is more reactive Gold(Au) or Platinum(Pt)?

gold is more reactive than platinum

[Shogun]

Which is more reactive Gold(Au) or Platinum(Pt)?

gold, but they are both found native(by itseld, not with other compounds/substance,etc) in the earth's crust as they both are very unreactive, but between paltinum ang gold, gold is more reactive.

[nid404]

Which is more reactive Gold(Au) or Platinum(Pt)?

Gold

Remember

Pond Slime Can Make A Zoo Interesting. The Long Crinkly Sort Goes Purple

This is the reactivity series

Potassium>Sodium>Calcium>Magnesium> Aluminium > Zinc>Iron>Tin>Lead>Copper>Silver>Gold>Platinum

great way to remember.....make mnemonics

[Shogun]

THANKS!! And how do we know if a reaction is a redox reaction!?

shogun;s way might be alittle bit confusing, an easier way to memorize it:

Oxidation: gain of oxygen, loss of electrons, loss of hydrogen

Reduction: loss of ogygen, gain of electrons, gain of hydrogen

Examples: analyze shogun;s examples, cuz they are good examples, lol

Thanks lil wayne, u made it easier for me lol...

[unknown 101]

and Mastermind, this is all i need to tell u

1)im the one who has to die, when its time for me to die, so let me live my life the way i want to!!
2)if u leave ur leavin the best, so u will have to settle for less
3)look at the ice, ridicolous price, ur camera has never seen a picture this nice
4)swallow my words taste my thoughts and if its to nasty spit it back at me
5)u could love me or hate me , i swear it wont make me or break me
6)i know this world is so cold and decieving, but i keep my head up like my nose is bleedin
hahaha
and lastley  take them shoes off ur teeth and stop runnin ur mouth

[xTremep]

Thanks nid

[nid404]

 :)ur welcome

[unknown 101]

What are the 3 conditions for the haber process?

[Shogun]

catalyst:iron
temperature: between 350 to 500 degre celcius
preassure at 200 atmospheres

[astarmathsandphysics]

What are the 3 conditions for the haber process?

heat pressure and temperature.

[nid404]

1) iron catalyst
2)450^oC
3)200atm