The concentration of oxalate ion (C2O42-) in a sample can be determined by titration with a solution of permanganate ion (MnO4-) of known concentration. The net ionic equation for this reaction is 2MnO4- + 5C2O42- + 16H+ --> 2Mn2+ + 8H2O + 10CO2 A 30.00 mL sample of an oxalate solution is found to react completely with 21.93 mL of a 0.1725 M solution of MnO4-. What is the oxalate ion concentration in the sample?

0.3152 M

Explanation:

The reaction that takes place is:

First we calculate the MnO₄⁻ moles used up in the titration, by multiplying the volume times the concentration:

Then we convert MnO₄⁻ moles to C₂O₄⁻² moles:

Finally we calculate the oxalate ion concentration, by dividing the moles by the volume:

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.