SEST-559 Chapter Notes - Chapter 4-5: Absolute Difference, Antiproton Decelerator, Significant Figures
STRONG ACID – STRONG BASE REPORT SHEET
Name: ________________________________________ Date: _____________
Laboratory instructor: __________________________________________________________
STANDARDIZATION OF 0.1 M NaOH SOLUTION
TRIAL #1
TRIAL #2
TRIAL #3
1.
Weight of KHP used (in grams)
_________
_________
_________
2.
Final burette reading (in mL)
_________
_________
_________
3.
Initial burette reading (in mL)
_________
_________
_________
4.
mL of NaOH used (V)
_________
_________
_________
5.
Moles of KHP
_________
_________
_________
(weight of KHP used) / 204.2
6.
Moles of base
_________
_________
_________
7.
Molarity of the base
_________
_________
_________
(moles of base × 1000) / V
8.
Average Molarity
____________±
M
9. Average deviation in parts per thousand
Show your calculations for calculating the average deviation in an appendix:
Q1: What would be a method to statistically eliminate a trial should you feel that one trial
is different from the others? Would this be practical with only three trials?
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STRONG ACID – STRONG BASE REPORT SHEET
Name: ________________________________________ Date: _____________
Laboratory instructor: __________________________________________________________
ANALYSIS OF UNKNOWN ACID:
SAMPLE # _______
TRIAL #1
TRIAL #2
TRIAL #3
1.
Weight of unknown used (g)
_________
__________
__________
2.
Final burette reading (in mL)
_________
__________
__________
3.
Initial burette reading (in mL)
_________
__________
__________
4.
mL of NaOH used (V)
_________
__________
__________
5.
Average molarity of NaOH
_________
__________
__________
(line 8, previous page)
6.
Moles of NaOH
_________
__________
__________
((line 4) × (line 5)) / 1000
7.
Moles of acid
_________
__________
__________
8.
Weight of Replaceable Hydrogen
_________
__________
__________
((line 7) × 1.008)
9.
% Replaceable hydrogen
_________
__________
__________
((line 8) × 100)) / (line 1)
10.
Average % Replaceable Hydrogen
_______________ ± ________________%
11.
Average deviation in parts per thousand
_______________
Show your calculations for calculating the average deviation in an appendix:
Q2: What are the correct steps to fill a burette while performing a titration that requires more than
50 mL?
Q3: Potassium hydrogen phthalate is hydroscopic. How would using a jar that was left
open for a significant period of time affect your results?
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Document Summary
Trial #3: weight of khp used (in grams) _________ ________: ml of naoh used (v) Moles of khp (weight of khp used) / 204. 2. Molarity of the base (moles of base 1000) / v. Average molarity of naoh (line 8, previous page) Moles of naoh ((line 4) (line 5)) / 1000. Weight of replaceable hydrogen ((line 7) 1. 008) % replaceable hydrogen ((line 8) 100)) / (line 1) Show your calculations for calculating the average deviation in an appendix: Q2: what are the correct steps to fill a burette while performing a titration that requires more than. Average molarity of naoh (line 5, previous page) Moles of naoh ((line 5) x (line 4)) / 1000. = ((line 7) x 1000)) / (line 1) Show your calculations for calculating the average in an appendix: ___________ ml of naoh ph at the equivalence point = Therefore the molarity of the hcl solution = molarity naoh solution x equiv.