raisin

????scan  
?????????
tommykwan222 ??? 2012-10-18 22:23

wait

?????????... XD
????????????

tommykwan222

wait

?????????... XD
????????????
raisin ??? 2012-10-18 22:24

    ??, ??table ??????

wonghoyat

??, ??table ??????
tommykwan222 ??? 2012-10-18 22:25

    ??user friendly.....

raisin

??, ??table ??????
tommykwan222 ??? 2012-10-18 22:25

???.......... =_=

tommykwan222

??user friendly.....
wonghoyat ??? 2012-10-18 22:26

??
???????

andesapple

???.......... =_=
raisin ??? 2012-10-18 22:27

?~ ?o?????~
??????~
?o???????~

karlathe

?........???ON9.........???PHY CHEM BIO?.........

tsangwui123

?........???ON9.........???PHY CHEM BIO?.........
karlathe ??? 2012-10-18 23:05

    ?????CCE????,??????

sasuke

??..redox ?????...???????
??..oxidizing agent ?Reducing Agent ?????
??? Oxidation Number ??...
MnO2 <----> MnO4-
step 1: Balance O
step 2:balance H
Steo 3:balance e-

For example in acidic medium,
???balance O,??H+.????
1.MnO2 +2H2O<---->MnO4-
????4?H..????4H+
2.MnO2+2H2O<----> 4H+ + MnO4-
????????/?? ???3+  [4h+ Minus ???]
??3?????(?????)
??Balance lu!
3.MnO2+2H2O <---> 4H+ + MnO4- + 3e-
Finished

???alkaline medium
?acidic???OH-?OK
MnO2+2H2O +4OH-<---> 4H+ + MnO4- + 3e- +4OH-
MnO2+2H2O +4OH-<--->MnO4- + 3e- +4H2O
MnO2+4OH-   <--->   MnO4- + 3e- +2H2O
  ??

raisin

??..redox ?????...???????
??..oxidizing agent ?Reducing Agent ?????
??? Oxi ...
sasuke ??? 2012-10-18 23:36

??????????, ?????balance?equation??