| SAYF HELP NEEDED! URGENTLY!!!!!!!!!!!!!!!!!!!!!!(CHEM) | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: SAYF HELP NEEDED! URGENTLY!!!!!!!!!!!!!!!!!!!!!!(CHEM) Wed Apr 21, 2010 10:01 pm | |
| I am about to stab this question. WHY IS THIS NOT POSSIBLE TO SOLVE???
MnO4- + C2O4-2---> CO3-2 + MnO2(s) (basic)
Write the balanced half reactions and overall net ionic equation.
I did this:
3e- + MnO4- + 4H2O---> MnO2 +2H2O +4OH-
8e- + C2O4-2 + 6H2O ---> 2CO3-2 +3H2O + 6OH-
Why the heck are both of them being reduced???!??!!!?!? What happened to the oxidation half-rxn? | |
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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: SAYF HELP NEEDED! URGENTLY!!!!!!!!!!!!!!!!!!!!!!(CHEM) Wed Apr 21, 2010 11:07 pm | |
| o man i HATED half rxns ... but i think u added the 3e- to the wrong side in the first half rxn ... | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: SAYF HELP NEEDED! URGENTLY!!!!!!!!!!!!!!!!!!!!!!(CHEM) Wed Apr 21, 2010 11:10 pm | |
| They are easy. And I could do them, but this one doesn't work for soem reason.
And no I added them to the right side. If you add all the charges on both sides, they are equal.
Left= -4 | Right= -4 | |
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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: SAYF HELP NEEDED! URGENTLY!!!!!!!!!!!!!!!!!!!!!!(CHEM) Wed Apr 21, 2010 11:13 pm | |
| umm u def added one of them to the wrong side they r supposed to cancel out | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: SAYF HELP NEEDED! URGENTLY!!!!!!!!!!!!!!!!!!!!!!(CHEM) Wed Apr 21, 2010 11:14 pm | |
| I know that Sherlocks lol
But did it correctly though. | |
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Doc NH Member
Number of posts : 15155 Username Change Points : 15318 Reputation : 133 Registration date : 2007-10-25 Mood : Country :
| Subject: Re: SAYF HELP NEEDED! URGENTLY!!!!!!!!!!!!!!!!!!!!!!(CHEM) Wed Apr 21, 2010 11:15 pm | |
| thats y u ddint get the right answer? u have 3e and 8 e on the same side | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: SAYF HELP NEEDED! URGENTLY!!!!!!!!!!!!!!!!!!!!!!(CHEM) Wed Apr 21, 2010 11:17 pm | |
| I know, that's where my problem is.
If you solve it, you will get the same 2 half-equations that I get. | |
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Ahmed NH Admin
Number of posts : 51452 Username Change Points : 61089 Reputation : 147 Registration date : 2007-10-14 Mood : Country :
| Subject: Re: SAYF HELP NEEDED! URGENTLY!!!!!!!!!!!!!!!!!!!!!!(CHEM) Fri Apr 23, 2010 8:00 pm | |
| I know what I did wrong now lol.
Notice that the "O"s weren't balanced in the second equation >.< | |
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| Subject: Re: SAYF HELP NEEDED! URGENTLY!!!!!!!!!!!!!!!!!!!!!!(CHEM) | |
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| SAYF HELP NEEDED! URGENTLY!!!!!!!!!!!!!!!!!!!!!!(CHEM) | |
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