Chemistry WCH01: Redox Equilibria Topical Past Paper Questions

This question is about chromium and its compounds. Some data are given in the table. (a) One of the most important uses of chromium is in plating other metals such as steel and brass. This gives them a hard shiny coating which is very resistant to corrosion. (i) Calculate $ E_{\t…

Standard electrode potentials are used to predict the thermodynamic feasibility of chemical reactions. (a) Standard electrode potentials can be determined by using the standard hydrogen electrode as a reference standard. (i) Label the diagram of the standard hydrogen electrode, i…

Methanol fuel cells have significant advantages over hydrogen fuel cells. The half equations for the methanol fuel cell are $$ \begin{aligned}&\mathrm{CO}_{2}\ +6\mathrm{H}^{+}\ +\ 6\mathrm{e}^{-}\ \rightleftharpoons\ \mathrm{CH}_{3}\mathrm{OH}\ +\ \mathrm{H}_{2}\mathrm{O}\ \ E^{…