[MartynYarrow]

A compound is known to be a hydrated double salt of potassium oxalate and oxalic acid of the type xK2C2O4 . yH2C2O4 . zH2O , where x, y and z have to be determined.

When 1.613g of this compound is dissolved in distilled water and the solution made up in 250mL, it is found that 25.0mL of this solution is neutralized by 19.05mL of 0.10M sodium hydroxide solution and reduces 25.40mL of 0.020M potassium permanganate solution. Calculate the composition of this salt.

the calculation steps are really confused, I need someone's help.

THANK YOU!

[Padfoot]

Start with balanced rxn eqns

How much Potassium oxalate reacts?
How much Oxalic acid reacts?

Mass of H20 can be found by subtracting combined masses above from 1.613g.  Convert mass to amount (mol) and you're almost there.