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University of Washington Chem 152 Thermodynamics 2 Lab 5 - The Temperature Dependence of the Solubility Product (Ksp) - ALL ANSWERS ARE CORRECT$11.99
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University of Washington Chem 152 Thermodynamics 2 Lab 5 - The Temperature Dependence of the Solubility Product (Ksp) - ALL ANSWERS ARE CORRECT
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Course
Thermodynamics 2
Institution
University Of Washington
Chem 152 Experiment #5: Thermodynamics II
The Temperature Dependence of the Solubility Product (Ksp)
By signing below, you certify that you have not falsified data, that you have not plagiarized any part of this lab report, and that
all calculations and responses other than the reporting of raw ...
university of washington chem 152 thermodynamics 2 lab 5 the temperature dependence of the solubility product ksp
chem 152 experiment 5 thermodynamics ii the temperature dependence
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Thermodynamics 2
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Name: Amanda Bryan Quiz Section: EL
ID Number: 1630090 Lab Partner: Yasmin Byott
Chem 152 Experiment #5: Thermodynamics II
The Temperature Dependence of the Solubility Product (Ksp) Note: All sections of this
report must be typed
Total Points = 60 (10 notebook, 50 template)
By signing below, you certify that you have not falsified data, that you have not plagiarized any part of this lab report, and that
all calculations and responses other than the reporting of raw data are your own independent work. Failure to sign this
declaration will result in 5 points being deducted from your report score.
Signature: Amanda Bryan
DATA AND CALCULATIONS data entry 4 pts
Part I. Flame emission determination of [K+] in the 0.50 M KCl + KHP (sat) solution
Preparation of Standards DATA
Table 1: Volume of 5.00x10-3 M needed to make Table 2: Flame Photometer Data
50 mL of each standard solution (from prelab) Solution [K+], (M) Intensity
Standard [K+], (M) mL of stock Standard 1 7.50E-05 81
1 7.50 E-5 0.75 Standard 2 1.50E-04 155
2 1.50 E-4 1.50 Standard 3 2.25E-04 230
3 2.25 E-4 2.25 Standard 4 3.00E-04 305
4 3.00 E-4 3.00 Standard 5 3.75E-04 375
5 3.75 E-4 3.75
Temperature,oC Intensity
KHP(sat)
in 0.50 M 22.5 290
Place your calibration plot (intensity vs. concentration of K+)
here. Make your plot+big enough to cover this
instruction box so that itCalibration Plotfor
is large enought ofsomeone
Intensityelse
vs.toConcentration
read. of K (M)
Add a370
Trendline and Trendline Eqn and on your plot and be sure to include titles for the plot and each axis.
320
270
4 pts
Intensity
220
y = 984000x + 7.8
170 R² = 0.9998
-1
120 slope 9.84E+05 M
y-intercept 7.8
70
6.50E-05 1.15E-04 1.65E-04 2.15E-04 2.65E-04 3.15E-04 3.65E-04
Concentration of K+ (M)
Table 3: Flame Emission Determination of [K+] in the original sample
Temperature, [K+] in Dilution [K+] in Original
o
C Measured factor Solution (M)
22.5 2.870E-04 2,500 0.718
Type the calculation you used to determine [K+] in the measured and original solutions above.
Intensity= (984000 M-1)[K+] + 7.8
.
290 = (984000 M-1)[K+] + 7.8 = 2 pts
[K+] = 290 -7.8 x = (2.87E-04 M)(2500)
984000 M-1
x = 0.718 M
Part II. Determination of [HP-] in Saturated KHP Solutions
A. Standardization of NaOH
Table 4: NaOH Standardization
Run 1 Run 2 Run 3**
Mass of KHP, g 0.131 0.132 N/A
Molar Mass of KHP, g/mol 204.22 204.22 204.22
Moles KHP 0.00064 0.00065 N/A
Initial buret volume, mL 0 0 N/A
Final buret volume, mL 6.35 6.40 N/A
Volume NaOH titrated, mL 6.35 6.4 N/A
Volume NaOH titrated, L 0.00635 0.0064 N/A
[NaOH], moles/L 0.101 0.101 N/A
Average, [NaOH] 0.101 M
Page 1 of 4
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