Answer to Question #153952 in General Chemistry for hyfd

Question

Data Table Molarity of Na2S2O3

0.125 M Initial Buret Reading (Na2S2O3) 1.50 mL

Final Buret Reading (Na2S2O3) 14.35 mL 

Calculate the percent error for your percent by mass of NaClO in the commercial bleach. (10 points) 

Answer 1

Initial volume= 1.5ml

Final volume=14.35ml

Volume used=12.85ml

$Molarity=\dfrac{n}{volume}$

$0.125M=\dfrac{n}{12.85}$

$=1.6moles$