Oxidation states Flashcards Preview

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Flashcards in Oxidation states Deck (5)
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1
Q

What are oxidation states used for?

A

see what has been oxidised and what has been reduced

aka oxidation numbers

2
Q

What does the oxidation state tell us? How is this different from ion number?

A

tells us about the distribution of electrons between elements of different electronegativity, the more electronegative an element, is given the negative oxygen state

3
Q

What are the rules?

A

every uncombines element has a oxidation state of 0

positive state shows the element has lost electrons

the more positive the number, the more element has been oxidised

4
Q

What are the anomilies?

A

H - +1, except in metal hydrides where it is -1)

Al - 3+

O - -2, except in peroxides where it is -1 (O-O single bond), or in OF2, where it is 2+

F - -1

Cl - -1 except in compounds with F and O where it has positive values

5
Q

What should the sum of all the oxidation states in a compound be?

A

0

since all compounds are electrically neutral

or equals charge on the ion