Explain what mass of sodium thiosulfate pentahydrate crystals, Na2S2O3.5H2Ois needed to prepare 500 ml of .1 M Na2S2O3 titrant solution?
If 12.354 g of sodium thiosulfate penthahydrate is actually utilized to make the titrnt solution (500mL), explain what is the actual molarity of the sodium thiosulfate solution?