Determine the initial concentrations of Fe3+ and SCN- in each test tube. Solution 0.002M iron(III) nitrate in 1M nitric acid(mL) 0.002M potassium thiocyanate(mL) DI water(mL) Absorbance(A) 1 3 2 1 0.128 2 2 3 1 0.269

Determine the initial concentrations of Fe3+ and SCN- in each test tube. Solution 0.002M iron(III) nitrate in 1M nitric acid(mL) 0.002M potassium thiocyanate(mL) DI water(mL) Absorbance(A) 1 3 2 1 0.128 2 2 3 1 0.269

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

Chapter15: Acid-base Equilibria

Section: Chapter Questions

Problem 20Q: Consider the following two acids: pKa1 = 2.98; pKa2 = 13.40 HO2CCH2CH2CH2CH2CO2H Adipic acid pKa1 =...

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Question

Determine the initial concentrations of Fe³+ and SCN- in each test tube.

Solution

0.002M iron(III) nitrate in 1M nitric acid(mL)

0.002M potassium thiocyanate(mL)

DI water(mL)

Absorbance(A)

1

3

2

1

0.128

2

2

3

1

0.269

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Step 2: Calculation of initial number of moles of Iron (III) ion in the solution

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Step 3: Calculation of initial concentration of Iron (III) ion in the solution

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Step 4: Calculation of initial number of moles SCN-

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Step 5: Calculation of initial concentration of SCN- ion in the solution

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