Portage Learning Chem 210 Module 18 and final exam 2023 with complete solution
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Course
CHEM 210
Institution
CHEM 210
Portage Learning Chem 210 - Module 1-8 and final exam 2023 with complete solution
Calculate volume 0.2 NaOH and # equivalence points for titration of 25mL 0.1 H3PO4
Calculate equivalence point volumes for titration of 25.00 mL of 0.060 M HCl and 0.10 M H3PO4 with 0.075 M NaOH
response factor
eq...
Portage Learning Chem 210 - Module 1-8 and
final exam 2023 with complete solution
1). Calculate volume 0.2 naoh and # equivalence points for titration of 25ml 0.1 h3po4
Ans: 2 eq points-
0.1M x 0.025L = 0.0025 mol H3PO4
mol H3PO4 = mol added NaOH
0.0025 mol NaOH / 0.2 M = 0.0125 L NaOH added
2). Calculate equivalence point volumes for titration of 25.00 ml of 0.060 m hcl and 0.10 m
h3po4 with 0.075 m naoh
Ans: exp 1 calculations
find moles total acid,
3). Response factor
Ans: Coefficient that makes the relative response of a detector to analyte and the
internal standard the same.
4). Equation to find unknown amount analyte using rf
Ans: (amount ethanol / amount IS) = (area ethanol / area IS) x RF
5). Equation for number of theoretical plates
Ans: N = 5.55 x (tr^2 / w1/2^2)
6). Hetp equation
Ans: L / N
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, 7). Principle components of a gc
Ans: Mobile phase reservoir --> [Sample injector --> stationary phase --> Detector] -->
readout
OVEN in brackets
8). Quantities on x and y axes in a chromatogram
Ans: x axis - retention time (min)
y axis - detector response
9). All strong acids
Ans: HCl, HBr, HI, HNO3, HClO4, H2SO4
10). Molecular weight and boiling point of ethanol
Ans: 46.07 g/mol
78.37 degrees
11). Molecular weight and boiling point of 1-butanol
Ans: 74.12 g/mol
117.40 degrees C
12). Calculate rf for mixture containing
ethanol: 8.0 x 10^-5 m with an area of 122,000
1-butanol:6.4 x 10^-5 m with an area of 172,000
Ans: 1.76
13). Desirable qualities for is in gc
Ans: similar in structure to analyte but not present under analysis
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