CHEM AND BIO HELP AND TIPS HERE

[Ivo]

it gained oxygen and hydrogen   oxidation and reduction to the same compound 
its like 1-1=0     so no oxidation then no REDOX

How do you mean, I still don't get why 3 is not redox.  Surely SO3 is reduced, H20 is oxidised?

And for 1 and 2,

S is being oxidised, O2 is being reduced

SO2 is being oxidised, O2 is being reduced right?

[Helium]

so will someone tell me whats single cell protien

[soraam]

no SO3 gaines O and H

[WARRIOR]

it gained oxygen and hydrogen   oxidation and reduction to the same compound 
its like 1-1=0     so no oxidation then no REDOX

some1 who does AS CHEM step in plz

[J.Darren]

Redox reactions, or oxidation-reduction reactions, have a number of similarities to acid-base reactions. Redox reactions are concerned with the transfer of electrons between species. Like acid-base reactions, redox reactions are a matched set -- you don't have an oxidation reaction without a reduction reaction happening at the same time. Oxidation refers to the loss of electrons, while reduction refers to the gain of electrons.

OIL RIG
oxidation is loss of electrons
reduction is the gain of electrons

Not only that, oxidation can also be referred to an increase in the oxidation number and the gain of oxygen.

[Ivo]

no SO3 gaines O and H

But if SO3 have been oxidised because they gain H2 and O, then surely H2O is being reduced, so redox

[Ivo]

Not only that, oxidation can also be referred to an increase in the oxidation number and the gain of oxygen.

So is it true that if there is an oxidation reaction, there must also be a reduction reaction at the same time?

[Angel Of Love]

so will someone tell me whats single cell protien

Single cell protein typically refers to sources of mixed protein  extracted from pure or mixed cultures of algae, yeasts, fungi or bacteria  used as a substitute for protein-rich foods, in human and animal feeds.

[soraam]

SO3 is oxidised and reduced

thats not what happens but you cam imagin it this way

[ambitious94]

Single cell protein is produced by microorganisms such as bacteria, fungi and unicellular algae in a fermentation vessel. While the product contains 72% protein, it does not taste very nice and is expensive to produce.
An alternative is Quorn. The filamentous fungus Fusarium graninearum is used to produce the mycoprotein known as Quorn.
The fungus is grown in a medium containing glucose and mineral salts at 30 degrees in the fermenter. The fungus is filtered off at a steady rate and dried. The filamentous nature of the fungus gives it a texture similar to meat. It can be flavoured with natural products and cooked i na similar way to meat. It is rich in protein, low in fat and has a good level fo fibre.

I won't worry about it much if I were you. Hope I could help!

[Ghost Of Highbury]

this drove me crazy during my IGCSEs too..

S + 02 --> S02

S - oxidation number 0..
O2 - oxidation number 0

SO2 --> oxidation number of O = (-2*2) = -4 , thus oxidation number of S = +4

S--> 0 to 4 oxidation
O -> 0 to -4 reduction

thus redox.

2S02 + 02-->2 S03

2SO2 -> oxidation number of O = (-2*2) = -4, thus S = +4.  O2 -> 0, final of O = -4+0 = -4

SO3--> Oxidation number of O = (-2*3) = -6, of S = +6

Final , S --> 4 to 6 oxidation

         O --> -4 to -6 reduction

SO3 + H20--> H2SO4

SO3 --> O = (-3*2) = -6 , thus S = +6

H2O --> O = -2, thus H = +2

O in both compounds thus, final number of O = -6-2 = -8

H2SO4--> O = (-2*4) = -8, thus H = +2, as final oxidation number of the compound shud be 0, -8+2+S = 0

thus, S = +6

now the changes

S --> 6 to 6
H --> 2 to 2
O --> -8 to -8..

NOt redox.

I AM NOT SURE ABOUT THIS , NID PLZ CHECK!

[Burhan.arshad]

do any one know any memonics for chemstry?

[holtadit]

I dont quite understand what the question is saying ; What RESULT ?

[nid404]

Is the answer D?

[Vin]

I dont quite understand what the question is saying ; What RESULT ?

i think its B