MediumChemistryHigh School (11–12)Redox Reactions › Oxidation Number and Types of Redox ReactionsConceptualA-Level AP IB NEET

A galvanised bucket is an iron bucket with a zinc coat…

Contributed by StemPy Lab

Try it on paper first. A hint, the key idea and the worked solution are here when you need them.

A galvanised bucket is an iron bucket with a zinc coat. A tin can is an iron can with a tin coat. Use $E^\circ(\text{Zn}^{2+}/\text{Zn}) = -0.76\ \text{V}$ , $E^\circ(\text{Fe}^{2+}/\text{Fe}) = -0.44\ \text{V}$ and $E^\circ(\text{Sn}^{2+}/\text{Sn}) = -0.14\ \text{V}$ . Explain what happens to the iron when each coat is scratched.

Need a reminder? The key ideaShow

A reaction can happen if $E^\circ = E^\circ(\text{reduced}) - E^\circ(\text{oxidised})$ is positive. A metal with $E^\circ < 0$ releases hydrogen from dilute acid. $\Delta G^\circ = -nFE^\circ$ , with $F = 96500\ \text{C/mol}$ .

The worked solution

Have you tried it?

Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.

← All Problems

← The Daniell cell has E° = 1.10 V for a reaction that moves 2 mol of electrons…Propene is CH₃CH=CH₂. Count its sigma bonds and its pi bonds… →

More onRedox Reactions › Oxidation Number and Types of Redox Reactions

Discussion (0)

Loading…