A. Preparation of Liquid Bleach 10 Volume of original liquid bleach (ml) B. Titr

Question

A. Preparation of Liquid Bleach 10 Volume of original liquid bleach (ml) B. Titration of Bleach. Trial #1 Trial #2 Trial #3 Buret reading, final (ml 21.10 45.00 33.50 Buret reading, initial (ml) 10.50 22.00 33.75 Volume of Na2S203 added ml) Volume of Na2S203 added Molar concentration of the Na2S203 (mol 10: 0.100 M Calculations 1. How many moles of sodium thiosulfate did you add for each trial? Trial #1 Trial #2 Trial #3 2. What is the average for the moles of sodium thiosulfate added for each trial?

Explanation / Answer

Moles of Thiosulphate added :

Trial 1 : molarity * volume in L = 0.1 * 0.0106 L =0.00106

Trial 2 : moles = 0.1 * 0.0115 L = 0.00115 moles

Trial 3 : 0.1 * 0.01125 = 0.001125 moles

Average moles : 0.0011 moles

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