Homework Help: Chemistry

Posted by Sara on Thursday, October 14, 2010 at 8:21am.

I know nothing about chemistry, but am wondering if someone could help me with these.

1) Balance this redox reaction using the oxidation-number method. Zn + O2 + HCl Ž ZnCl2 + H2O

2) Balance this redox reaction using the half-reaction method. (basic solution) Zn + MnO4- Ž Zn(OH)2 + MnO2

Chemistry - Sara, Thursday, October 14, 2010 at 2:46pm
I believe #1 is 2Zn+02+4---->2Zn Cl2+2H20,can someone confirm?
Chemistry - Ella, Thursday, October 14, 2010 at 5:25pm
1st one is right, the second one cant be right because there is no H on the left side.

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