Calculating Percentage Composition, Normality, and ppM of a Compound in a Sample
What are the steps to calculate the percentage composition of K2C2O4 in the sample, normality of the KMnO4 used in the titration, and ppM of K+ in the sample?
Percentage Composition of K2C2O4 in the Sample
Normality of KMnO4 Used in the Titration
To find the normality of the KMnO4 used in the titration, we first calculate the moles of KMnO4 used by multiplying the volume of the KMnO4 solution (40.00 mL or 0.04000 L) by the concentration of the solution (0.0200 M). Using the balanced equation and stoichiometry of the reaction, we then determine the moles of K2C2O4. By dividing the moles of KMnO4 by the volume of the solution, we can find that the normality of KMnO4 used in the titration is 0.020 N.
ppM of K+ in the Sample
To calculate the ppM of K+ in the sample, we first determine the moles of K2C2O4 in the sample by dividing the mass of K2C2O4 by its molar mass. We then use the stoichiometry of the compound to find the moles of K+. By dividing the moles of K+ by the moles of K2C2O4 and multiplying by 10^6, we find that the ppM of K+ in the sample is 1.99 x 10^6 ppM.