Oxalic acid, h2c2o4, reacts
withdichromate ion, in acidic solution to produce carbon dioxide
andchromium(iii) ion.
if exactly 40.0 ml of an oxalic acid solution is required to
reactcompletely with 55.0 ml of a 0.0250 m dichromate solution,
what isthe molarity of the oxalic acid solution?

0.005M

Explanation:

First deduce the oxidation and reduction half equations and from that obtain the balanced redox reaction equation. From that, the number of moles of reacting species are seen from the stoichiometry of the reaction from which the number of moles of oxalate is obtained and substituted to obtain the molar concentration of oxalate.