Chem 241 correct - Study guides, Class notes & Summaries
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Chem 241 Electrochemistry Correct Answers Latest Update
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What is a junction potential? - correct answers When dissimilar electrolyte solutions are in contact, a voltage difference, called a junction potential, will usually develop at their interface. 
 
What is a fundamental limitation on the accuracy of direct potentiometric measurements? Why? - correct answers Junction potential; we do not know its contribution to voltage 
 
What is alkaline error when using a pH measuring glass electrode? - correct answers Too much Na+ relative to H+, electrode wil...
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Chem 241 Reactions Correct Answers Latest Update
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Lab 3 Acid Base Extraction: Carboxylic Acid reactants (in order) - correct answers NaOH, HCl 
 
Lab 3 Acid Base Extraction: Amine reactants (in order) - correct answers HCl, NaOH 
 
Lab 5 Friedal-Crafts Acylation Reactants - correct answers ferrocene, acetyl chloride, aluminum chloride, methylene chloride 
 
Lab 5 Friedal-Crafts Acylation Products - correct answers ferrocene, monoacetylferrocene, diacetylferrocene 
 
Lab 6 Reactivity of Aromatic Compounds Reactants - correct answers anisole, ani...
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Chem 241 - Van Deemter Equation Correct Answers Latest Update
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What is the Van Deemter equation? - correct answers H = A + B/ux + Cux 
 
Independent of flow velocity - correct answers A term 
 
Inapplicable in open tubular columns - correct answers A term 
 
Inversely proportional to flow rate - correct answers B term 
 
Proportional to temperature - correct answers D (diffusion coefficient) / B term (longitudinal diffusion) 
 
Proportional to linear flow velocity - correct answers C term 
 
Inversely proportional to temperature - correct answers C term (th...
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CHEM 241 - Analytical Chemistry, Acid/Base Correct Answers Latest Update
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Arrhenius acid - correct answers increases [H+] in water 
 
Arrhenius base - correct answers increases [OH-]
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Chem 241 Lab 5 postlab Goldman
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Chem 241 Lab 5 postlab 
Aaron C Ong 
TOTAL POINTS 
16 / 16 
QUESTION 1 
1 Page 1 **please tag all pages in your 
upload** 9 / 9 
 + 9 pts Correct 
 + 1 pts Mass listed 
 + 1 pts mp listed 
 + 1 pts % yield calculated 
 + 1 pts state stereoisomer they made 
 + 2 pts draw correct conclusion about mechanism 
 + 3 pts correctly drawn mechanism 
 + 1.5 pts partially correct mechanism (e.g. wrong 
arrows) 
 + 0 pts All blank / incorrect 
 - 1.8 pts Late 
QUESTION 2 
2 Page 2 - Questi...
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Lab 6 PostLab CHEM 241|very helpful
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Chem 241 Lab 6 Postlab 
Estella Rachana Khieu 
TOTAL POINTS 
45.5 / 49 
QUESTION 1 
1 Page 1 Q1/2 4 / 4 
 - 0 pts Correct 
 - 2 pts Q1 - wrong ID 
 - 1 pts Q2 mass missing 
 - 0.5 pts Q2 yield < 20% (theoretical yield 3-3.75 
grams depending on which benzoic acid) 
 - 1 pts Q2 mp missing 
 - 0.5 pts Q2 mp off by more than 10C 
benzoic acid: 122C 
2-methylbenzoic acid: 102C 
4-methylbenzoic acid: 179C 
2,5-dimethylbenzoic acid: 132C 
 - 4 pts All blank / wrong 
 - 9.8 pts Late (a...
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CHEM 110 PLQ's QUESTIONS AND ANSWERS GRADED A+
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CHEM 110 PLQ's QUESTIONS AND ANSWERS GRADED A+ 
Perform the calculation to the correct number of significant figures: (20.505 x 0.044)/2.0109 
0.45 
 
 
 
What is the mass of a sample of diamond that has a volume of 2.59 mL if the density of diamond is 3.52 g/cm3? (A single diamond that weighs this much has an estimated value of $200-$250 million). 
9.12 g 
 
 
 
 
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