Chem Lab!

Due date Thursday at 1 PM Newyork Time.

 

The questions in the picture Pic 1 are the Lab questions for Cu 2+ ion, and the question in Pic 2 is the Pre-Lab. The tables are related to Pic 1 and needs to be filled with showing all steps.

Equation:

2Cu2+ + 2SO2-3 + 2I- 2 CuI + S4O2-6

Given: (During 3 trials)

1- [Na2S2O3] = 0.0206 M

10 ml

10 ml

Trial 1	Trial 2	Trial 3
Volume of Na2S2O3 used (ml)	21.30	21.20	22.00
Amount of Na2S2O3 used (mol)
Amount on Cu2+ in unknown sample (mol)
Volume of original Cu2+ solution used (mol)			10 ml
[Cu2+] in original solution (M)

2- Average concentration of Cu2+ (M)? (Show all calculation in number 1 and 2)