A Level Edexcel summary notes. Includes a summary of key information, referring to specific spec points. Written in clear, easy-to-read, digital handwriting. These are the notes I used to revise to obtain an A* in chemistry in 2024.
Oxidation land therefore reduction can e defined as:
↓) oxygen:
· oxidation is the gain of oxygen
· Reduction is the loss of oxygen
2) Hydrogen:
· oxidation is the loss ofhydrogen
· Reduction is the gain of hydrogen
Electrons:
3)
o oxidation is the loss of
electrons
· Reduction is the gain electrons
of
4) oxidation Numbers:
o oxidation involves an increase in oxidation number
· Reduction involves a decrease in oxidation number
Oxidation Number:
· The number ofelectrons gained or lost if the compound were to be
considered fully ionic
· Bules for assigning oxidation number
1) the atom
If is in an element, o.N. 0
=
2) Flourine is always o.N.=-1
3)Hydrogen is usually 0. N. =
+1
*yorogen can be 0.N=-1 in compounds with reactive metals
4) oxygen is usually 0.N.=-2
oxygen can be o.N=-1 in peroxide H202
0.N.= +2 in Ofz
0.N. 0
= in 02/03
5)Use Periodic table/common sense
e.g. group 2 likely to be +2
group I likely to be th
0.N.'s usually so in twos
Roman Numerals
oxidation state of elementin a
·
Roman numerals are used to show an
compound which has variable oxidation states
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller rosie70654. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.19. You're not tied to anything after your purchase.
