concentration iron(II) nitrate 0.00400 0.00400 0.00400 0.00400 0.00400 (Fe(NO3)3l (M) Concentration potassium thiocyanate [KSCN] (M) 0.00400 0.00400 0.00400 0.00400 0.00400 Volume Fe(NO3)3 (mL) 5.00 5.00 5.00 5.00 5.00 Volume KSCN (mL) 5.00 4.00 3.00 2.00 1.00 Volume DI water (mL) 0.00 1.00 2.00 3.00 4.00 Initial concentration [Fe3*] (M) .00200 .00200 .00200 .00200 .00200 Initial concentration [SCN'] (M) .00200 .00160 .00120 .000800 .000400 Absorbance 0.784 0.587 0.474 0.369 0.165 Equilibrium [FESCN²ª] (M) Equilibrium constant K. Average K.

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Can you help me answering the last 3 rows which is the Equilibrium [FeSCN2+] (M ), Equilibrium constant Kc and Average Kc.

K EQUILIBRIUM · EQUILIBRIUM CONSTANT (SPECTROPHOTOMETRY)
SUBMIT
INTRODUCTION
LABORATORY SIMULATION
PHASE 9:
Lab Data
- X
Determine concentration of
FESCN2+
Diluted solutions
Complete the following steps. Place all
Wavelength:
used glassware in Wash/Waste bin.
Solution 1
Solution 2
Solution 3
447 nm
Use clean Pasteur pipet to
transfer the following solutions
Volume stock solution (mL)
4.00
4.00
4.00
ENTER WAVELENGTH
Volume DI water (mL)
1.00
2.00
3.00
into separate 1-cm cuvettes
Concentration iron(III) thiocyanate ion
[FeSCN2*] (M)
• solution 1
• solution 2
0.000240
0.000200
0.000171
Absorbance:
0.165
solution 3
solution 4
Calibration curve
• solution 5
MEASURE SAMPLE
Concentration iron(III) thiocyanate ion
[FeSCN2+] (M)
Solution
Absorbance
Use wipes to clean cuvettes
CALIBRATED
Stock
0.000300
0.381
3
Measure and record the
Solution 1
0.000240
0.305
absorbance for each sample in
Lab Data
Solution 2
0.000200
0.254
"會會會會
• Place cuvette containing
12 3 45
Solution 3
0.000171
0.217
solution into
spectrophotometer
• Select Measure Sample
BELS
Molar absorptivity (M^cm-1)
1270
GO TO PHASE 10
Prepared solutions, absorbance, and calculated [FESCN2*]
PHASES
Transcribed Image Text:K EQUILIBRIUM · EQUILIBRIUM CONSTANT (SPECTROPHOTOMETRY) SUBMIT INTRODUCTION LABORATORY SIMULATION PHASE 9: Lab Data - X Determine concentration of FESCN2+ Diluted solutions Complete the following steps. Place all Wavelength: used glassware in Wash/Waste bin. Solution 1 Solution 2 Solution 3 447 nm Use clean Pasteur pipet to transfer the following solutions Volume stock solution (mL) 4.00 4.00 4.00 ENTER WAVELENGTH Volume DI water (mL) 1.00 2.00 3.00 into separate 1-cm cuvettes Concentration iron(III) thiocyanate ion [FeSCN2*] (M) • solution 1 • solution 2 0.000240 0.000200 0.000171 Absorbance: 0.165 solution 3 solution 4 Calibration curve • solution 5 MEASURE SAMPLE Concentration iron(III) thiocyanate ion [FeSCN2+] (M) Solution Absorbance Use wipes to clean cuvettes CALIBRATED Stock 0.000300 0.381 3 Measure and record the Solution 1 0.000240 0.305 absorbance for each sample in Lab Data Solution 2 0.000200 0.254 "會會會會 • Place cuvette containing 12 3 45 Solution 3 0.000171 0.217 solution into spectrophotometer • Select Measure Sample BELS Molar absorptivity (M^cm-1) 1270 GO TO PHASE 10 Prepared solutions, absorbance, and calculated [FESCN2*] PHASES
EQUILIBRIUM · EQUILIBRIUM CONSTANT (SPECTROPHOTOMETRY)
SUBMIT
INTRODUCTION
LABORATORY SIMULATION
PHASE 9:
A Lab Data
- X
Determine concentration of
FESCN2+
Prepared solutions, absorbance, and calculated [FESCN<"]
Verify your equilibrium concentration calculation.
Did you report your data to the correct number of significant figures?
Complete the following steps. Place all
Wavelength:
used glassware in Wash/Waste bin.
concentration iron(I) nitrate
0.00400
447 nm
0.00400
0.00400
0.00400
0.00400
[Fe(NO3)3] (M)
Use wipes to clean cuvettes
Concentration potassium thiocyanate
[KSCN] (M)
ENTER WAVELENGTH
0.00400
0.00400
0.00400
0.00400
0.00400
Measure and record the
absorbance for each sample in
Lab Data
Volume Fe(NO3)3 (mL)
5.00
5.00
5.00
5.00
5.00
Absorbance:
Volume KSCN (mL)
5.00
0.165
4.00
3.00
2.00
1.00
• Place cuvette containing
solution into
Volume DI water (mL)
0.00
1.00
2.00
3.00
4.00
MEASURE SAMPLE
spectrophotometer
• Select Measure Sample
• Remove cuvette from
Initial concentration [Fe3+] (M)
.00200
.00200
.00200
.00200
.00200
Initial concentration [SCN'] (M)
.00200
.00160
.00120
.000800
.000400
CALIBRATED
spectrophotometer and
place in cuvette rack
Absorbance
0.784
0.587
0.474
0.369
0.165
Equilibrium (FesCN2*] (M)
Calculate iron(III) thiocyanate
complex ion concentration (in
Equilibrium constant K.
M) for each solution. Record in
Lab Data
Average K.
BELS
GO TO PHASE 10
How to calculate iron(IIl) thiocyanate complex ion concentration for stock solution
PHASES
11
Transcribed Image Text:EQUILIBRIUM · EQUILIBRIUM CONSTANT (SPECTROPHOTOMETRY) SUBMIT INTRODUCTION LABORATORY SIMULATION PHASE 9: A Lab Data - X Determine concentration of FESCN2+ Prepared solutions, absorbance, and calculated [FESCN<"] Verify your equilibrium concentration calculation. Did you report your data to the correct number of significant figures? Complete the following steps. Place all Wavelength: used glassware in Wash/Waste bin. concentration iron(I) nitrate 0.00400 447 nm 0.00400 0.00400 0.00400 0.00400 [Fe(NO3)3] (M) Use wipes to clean cuvettes Concentration potassium thiocyanate [KSCN] (M) ENTER WAVELENGTH 0.00400 0.00400 0.00400 0.00400 0.00400 Measure and record the absorbance for each sample in Lab Data Volume Fe(NO3)3 (mL) 5.00 5.00 5.00 5.00 5.00 Absorbance: Volume KSCN (mL) 5.00 0.165 4.00 3.00 2.00 1.00 • Place cuvette containing solution into Volume DI water (mL) 0.00 1.00 2.00 3.00 4.00 MEASURE SAMPLE spectrophotometer • Select Measure Sample • Remove cuvette from Initial concentration [Fe3+] (M) .00200 .00200 .00200 .00200 .00200 Initial concentration [SCN'] (M) .00200 .00160 .00120 .000800 .000400 CALIBRATED spectrophotometer and place in cuvette rack Absorbance 0.784 0.587 0.474 0.369 0.165 Equilibrium (FesCN2*] (M) Calculate iron(III) thiocyanate complex ion concentration (in Equilibrium constant K. M) for each solution. Record in Lab Data Average K. BELS GO TO PHASE 10 How to calculate iron(IIl) thiocyanate complex ion concentration for stock solution PHASES 11
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