Chem - Redox Reactions Help (1 Viewer)

[freezeice04]

Im not very good at redox reactions and I just wanted to make sure I done these right:

Write the half-equations for these and label each as oxidation or reduction:

1. Zn + Cu^2+ --> Zn^2+ + Cu

2. Cl2 + 2I^- ---> I2 + 2CL^-

3. Mg + 2H^+ --> H2 + Mg^2+

Any help would be greatly appreciated.

 

[thongetsu]

1. Zn = Zn^2 + 2e-
Cu^2 = Cu + 2e-

not bothered doing the rest.

 

[hscishard]

3. Mg ---> Mg(2+) + 2e-
2(h+) + 2e- ---> h2

 

[super.muppy]

1. Zn = Zn^2 + 2e-
Cu^2 = Cu + 2e-

not bothered doing the rest.

LOL yea just adding to it
Zn = Zn^2 + 2e- oxidation (i.e. lost electrons)
Cu^2 = Cu + 2e- reduction (i.e gain electrons)

 

[hscishard]

2. 2I- ---> 2I + 2e-
Cl2+2e- ---> 2Cl-

For the first part should it be I- ---> I + e- or just the above?

 

[thongetsu]

remember O.I.L R.I.G.

oxidation is loss. rape is good, i mean rep is good, i mean reduction is gain.