Chem 241 correct - Study guides, Class notes & Summaries

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...

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...

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...

Arrhenius acid - correct answers increases [H+] in water Arrhenius base - correct answers increases [OH-]

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...

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...

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 Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:05 / 0:15 Full screen Brainpower Read More In Eur...