Question

What is the oxidation state of Cr2 in K2Cr2O7?

Answer 1

\(\huge{Cr_{2}}\) in \(\huge{K_{2}Cr_{2}O_{7}}\)

Answer 2

points I noted:
1. there is no charge so net oxidation must be zero, 0
2. charge of K is -1, chromium has NO charge, oxygen is TYPICALLY -2 charge.

Answer 3

+6

Answer 4

1x2 +2x +(-2) x7 =0

Answer 5

I did 7(-2) for Oxygen and 2(1) for Potassium

Answer 6

and the \(\large{x}\) is the Chromium?

Answer 7

14-2=12
12/2=6

Answer 8

1* 2 +2x +(-2) * 7 =0

Answer 9

I got -12 charge. To counter is +12 and Cr is 2 so 12/2 is 6

Okay I got it

Answer 10

How about this one?\[\large{Fe_{3}O_{4}}\]

Answer 11

8/3

Answer 12

I think this:
net is 0
O is 4(-2) ...

yes that lol

Answer 13

okay I have an organic compound question --
how do I know when a compound is \(\Large{propanol}\)?

Answer 14

actually scratch that

Answer 15

has 3 C and one OH

Answer 16

how do I know when a compound is \(\Large{ethanoic}\) acid

Answer 17

sorry I figured out the propanol one, thanks though

Answer 18

CH₃COOH (acetic acid)

Answer 19

yes but how do I know to get that formula? is there any tips/tricks

Answer 20

also... Fe in \(\huge{Fe_{3}O_{4}}\) has a decimal oxidation...?

Answer 21

yes it is an average 2 atoms has oxidation of 3 and one oxidation of 2

Answer 22

so Fe has \(\approx+2\) oxidation

Answer 23

+2 and +3 depends with what they react, this it is a particular compound that has both
https://en.wikipedia.org/wiki/Iron(II,III)_oxide

Answer 24

I saw .gif and expected an animation.... lol

Answer 25

But thank you :)

Answer 26

http://www.rjwsciencestm.com/12U-Pics/functgrp.gif

Answer 27

!!! I KNEW THE FORMULA I WROTE WAS BAD

Answer 28

gtg see you later

Answer 29

alright thank you :)

Answer 30

see ya~