A .750 g sample of an uknown solid is dissolved in 100 mL of water and acidified with 25 mL of 3 M H2SO4 then titrated with a .0200 M KMn04 solution. If the unknown solid requires 12.5 mL of the KMnO4 solution to reach the endpoint, what is the % sodium oxalate in the unknown solid? Assume the only compound in the unknown solid that reacts with the KMnO4 solution is sodium oxalate. Report your answer as a percentage.
Can someone please help?? i can't figure this one out! I'm not even sure where to begin. If someone could explain how to start I think I could figure out the rest.