COMPLEX PREPARED (preparation #3 ) cuciz H20 Starting metal salt (MX H,0) copper (IT)chloride dinydrate Metal (Cu or Co) cu Halide (Cl or Br) CL Amine (en, bu, pz, or dien) bu (1] Vield of the Complex Mass of crystalline product (Exp. Yield) 29.682 (2a) Determination of Copper Calculate the mols of NaS;O, to reach the end point, and then calculate the moles of Cu from the stoichiometry. Finally, calculate the % Cu in the sample. Show your calculations on the next page. Trial 2 Trial 1 O.103g 20.5mL 0.19 Mass of product,g Vol. of Na;S;O, to reach the end point, ml. Molarity of NazS;0, (from bottle) O.0100M Mols of Na;S:O, 0.0002.05 0.000210 0.00020S O:000 210 Mols of Cu Mass of Cu, g 0.0130 0.0 133 % Cu in product Ave % Cu Calculations: 0.100M = mol 0.0 20SL 63.55 = 1 0.0002 DS %3D

COMPLEX PREPARED (preparation #3 ) cuciz H20 Starting metal salt (MX H,0) copper (IT)chloride dinydrate Metal (Cu or Co) cu Halide (Cl or Br) CL Amine (en, bu, pz, or dien) bu (1] Vield of the Complex Mass of crystalline product (Exp. Yield) 29.682 (2a) Determination of Copper Calculate the mols of NaS;O, to reach the end point, and then calculate the moles of Cu from the stoichiometry. Finally, calculate the % Cu in the sample. Show your calculations on the next page. Trial 2 Trial 1 O.103g 20.5mL 0.19 Mass of product,g Vol. of Na;S;O, to reach the end point, ml. Molarity of NazS;0, (from bottle) O.0100M Mols of Na;S:O, 0.0002.05 0.000210 0.00020S O:000 210 Mols of Cu Mass of Cu, g 0.0130 0.0 133 % Cu in product Ave % Cu Calculations: 0.100M = mol 0.0 20SL 63.55 = 1 0.0002 DS %3D

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

COMPLEX PREPARED (preparation #3 )
cuclz H20
Starting metal salt (MXx,_H;O) Copper (T)chloride dinydrate
Metal (Cu or Co) cu
Halide (Cl or Br) CL
Amine (en, bu, pz, or dien) bu
(1] Yield of the Complex
Mass of crystalline product (Exp. Yield)
29.682
(2a) Determination of Copper
Calculate the mols of Na,S:O, to reach the end point, and then calculate the moles of Cu from the
stoichiometry. Finally, calculate the % Cu in the sample. Show your calculations on the next page.
Trial 2
Trial 1
O.103g
20.5mL
Mass of product,g
0.19
21.ML
Vol. of Na;S:O, to reach the end point, ml.
Molarity of NazS;0, (from bottle)
0.0100M
0.0002 05
0.000 205
0.000 210
O.000 210
Mols of NazS:O,
Mols of Cu
Mass of Cu, g
0.0130
0.0133
% Cu in product
Ave % Cu
Calculations:
O.100 M = mol
0.0 20SL
63.55 = 9
0.0002DS
%3D
O 10100 M = mol
o021 니
63.55 =
0.00021
%3D
85

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A 20 mL volume of 0.015 M KIO3 containing an excess of KI, is added to a 0.312 g sample of a Real Lemon solution containing vitamin C. The Yellow-brown solution, caused by excess I2 is titrated to a colorless starch endpoint with 11.3 mL pf 0.106M Na2S2O3. - What is the equation for I2 * starch deep blue color disappearance?
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