1,000,000 Question Thread :D

[kenhung123]

Fundamental THANKS!

[kenhung123]

Is this reduction: 2I- => I2+2e  ?

[kenhung123]

When it lose elections shouldn't it be oxidation?

[Edmund]

Oxidation is the loss of electrons:

E.g.

Reduction is gain:

E.g.

Is this reduction: 2I- => I2+2e  ?

Oxidation

[kenhung123]

Oxidation is the loss of electrons:

E.g.

Reduction is gain:

E.g.

Is this reduction: 2I- => I2+2e  ?

Oxidation

Thank ya

[Ilovemathsmeth]

Reduction occurs when there is a decrease in oxidation number. So in the above case, the O.N changes from -1 to 0 - i.e. there is an increase in O.N, so it is oxidation not reduction.

[stonecold]

AN OIL RIG CAT
Oxidation is Loss of Electrons and occurs at the anode.
Reduction is Gain of electrons and occurs at the cathode.

Best 4 words you will ever learn! 

[Ilovemathsmeth]

They are pretty helpful.

[kenhung123]

How does the H+ cancellation work?

E.g.

X + Y + 7H+ => Y + X + 2H+

Would it be:

X + Y + 5H+ => Y + X ?

[Potter]

How does the H+ cancellation work?

E.g.

X + Y + 7H+ => Y + X + 2H+

Would it be:

X + Y + 5H+ => Y + X ?

Yeah, that's pretty much it, you do the same thing when you have water on both sides of the equation. Don't just apply that to H+'s

[kenhung123]

So you just minus the large from the small and add it to the side which the large is from?

[kyzoo]

It's just like algebra

[kenhung123]

Thank you

[kenhung123]

1. A sample of brown dye from a lolly is placed at the origin on a strip of chromatography paper. The solvent front moves up 9.0cm from the origin. A blue component of the dye moves 7.5cm and a red compoenent 5.2cm in the same time. Calculate the Rf values of the 2 components.

(I got Rf blue as 0.83 and Rf red as 0.58)
2. A sample of brown dye used in a brand of writing ink was found to contain blue and yellow components. The Rf values of these substrances using ethanol as a solvent are 0.59 and 0.19 respectively.

How far apart would the blue and yellow componenets be after the solvent front has move 8.0cm from the origin?
(I got 3.2cm)

[Aden]

You're correct?