Can Half-Cell Potentials Predict Redox Reactions?

[salman213]

yes ------Is Ni2+(aq) capable of oxidizing H2(g)?
no -------Is Fe2+(aq) capable of reducing VO2+(aq)?
no -------Is Cr3+(aq) capable of oxidizing Fe2+(aq) to Fe3+(aq)?
yes ------Is Sn2+(aq) capable of oxidizing Fe2+(aq)?
yes ------Is Fe3+(aq) capable of oxidizing Sn metal to Sn2+(aq)?
no -------Is Fe2+(aq) capable of reducing Cr3+(aq) to Cr metal?


can anyone quickly check these

 

[Gokul43201]

We need to see some kind of explanation. Can you explain how you arrived at those answers?

 

[salman213]

someone told me to do this

Write down the standard reduction potential of the couple to be reduced.

Write down the negative of the standard reduction potential of the couple to be oxidized.

Add them up.

Is the answer positive (yes/no)


i did that and came to that conclusion but i need someone to check my answers before i submit them

 

[Gokul43201]

Your method is correct. I haven't checked your numbers but the first one doesn't look right.