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CHEM 210 Final Exam – (2026) Actual Questions & Answers (Biochemistry) 100% Guarantee Pass, Exams of Biochemistry

Liberty University (LU)Biochemistry

CHEM 210 Final Exam features actual 2026 biochemistry questions with verified answers covering statistical analysis, hypothesis testing, p-values, confidence intervals, measurement errors, analytical chemistry concepts, and comprehensive CHEM 210 final exam topics. Ideal for quizzes, cumulative finals, exam review, and last-minute study preparation. CHEM 210 Final Exam, CHEM 210 Final Exam Questions, CHEM 210 Final Exam Answers, CHEM 210 Biochemistry Exam, CHEM 210 Test Bank, CHEM 210 Practice Test, CHEM 210 Study Guide, CHEM 210 Final Exam PDF, CHEM 210 Review, Analytical Chemistry Exam, Statistics in Chemistry, P Value Questions, Hypothesis Testing Chemistry, Confidence Interval Questions, Random Error Analysis, Measurement Error Questions, Statistical Inference Exam, CHEM 210 Quiz Answers, CHEM 210 Verified Answers, College Chemistry Final, Biochemistry Practice Questions, CHEM 210 Comprehensive Exam, CHEM 210 Latest Exam, CHEM 210 Midterm and Final, Chemistry Final Review

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CHEM 210 Final Exam
Questions and Answers
1. if the p-value is greater than 0.1, we generally conclude the data are consis- tent with
the null hypothesis: true
2. what is the best way to characterize the random error present in a mea-
surement?: take replicate measurements of your analytes and using the standard deviation
and a t-table specify an error bar with a confidence limit
3. statistical interference assesses whether an observed phenomenon in the data can
reasonably be attributed to chance or not: true
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CHEM 210 Final Exam

Questions and Answers

  1. if the p-value is greater than 0.1, we generally conclude the data are consis-tent with the null hypothesis: true
  2. what is the best way to characterize the random error present in a mea- surement?: take replicate measurements of your analytes and using the standarddeviation and a t-table specify an error bar with a confidence limit
  3. statistical interference assesses whether an observed phenomenon in thedata can reasonably be attributed to chance or not: true
  1. suppose we collected a sample size n = 100 from some population and used the data to calculate a 95% confidence interval for the population mean. now suppose we are going to increase the sample size to n = 300. keeping all else constant, which of the following would we expect to occur as a resultof increasing the sample size?: (1) the standard error would decrease, (2) the margin of error would decrease
  2. in designing a clinical trial where each subject receives both a placebo and a proposed treatment, what statistical test would be most appropriate?: pairedt-test 6. an atomic absorption analysis is to be done on the calcium in a sample of powdered milk. a 12.55 gram sample of the powder is wet ashed in nitricacid and diluted to 50.00 mL with distilled water. a 1.00 mL aliquot of this is transferred to a 50.00 mL solution using EDTA. using a wavelength of 422.6 nm in an atomic absorption experiment, this diluted sample showed an absorbance of 0.375. a standard calcium sample (treated the same way) with a known concentration of 20.0 ppm provided an absorbance of 0.859. what is the ppm of calcium in the powdered milk?: 437 ppm
  1. to measure the Ca in breakfast cereal, 0.561 g of crushed Cheerios was digested at 600*C in air for 2 hours. the residue was dissolved in 6 M HCl, quantitatively transferred to a volumetric flask and dilution to 100.0 mL. then5.00-mL aliquots were transferred to 50.0-mL volumetric flasks. each was treated with standard Ca2+ ion solution (20.0 ppm), diluted to volume with H2O, and analyzed by flame atomic absorption. a graph was constructed fromthe readings. use this graph to determine the wt% Ca in Cheerios.: 0.4%
  2. the pH of the titration solution at the equivalence point is 9.45. this is consistent with titration of a weak acid with strong base.: true
  3. how many liters of a 2 M Ba(OH)2 are needed to titrate a 4 L solution of 6M H3PO4?: 18 L

solution: (4 x X) = (4 x 18)

  1. the charge balance equation for a solution containing H2O, H+, OH-, Ca2+,K+,

C2H5OH, CrO4(2-), and Cl- is:: [H+] + 2[Ca2+] + [K+] = [OH-] + [Cl-] + 2[CrO4(2-)]

14. what is the [H3O+] of a 2 M aqueous solution of a weak acid HXO2 with Ka = 3.2 x 10^-5?: 8.0 x 10^-3 M

  1. glutamic acid is an amino acid consisting of 2 carboxylic acid functional groups and an amine functional group. pKas are listed as 2.19, 4.25, and 9.67.at pH 7, the charge on the glutamic molecule is?: - 16. which of the following is NOT a characteristic of an amphoteric species?- : amphoteric species are always nonpolar
  2. all of the following are TRUE for activities and activity coefficients, ex- cept...: as ionic strength increases, the value of the activity coefficient increases
  3. glutamic acid is an amino acid consisting of 2 carboxylic acid functional groups and an amine functional group. pkas are listed as 2.19, 4.25, and 9.67.the approximate pH of 0.025 M HL- is?: 6.

malonate (C3H2K2O4, FM = 180.242 g/mol) in 100 mL water. for malonic acid,pka1 = 2.847, pKa2 = 5.696.: 5.

  1. a solution is prepared with an unknown concentration of a theoretical compound with a Ka of exactly 1.0. what is the pH of this solution?: less than
  2. the mass balance equation for F- in a 0.02 M aqueous solution of KFis...: [HF] + [F-] = 0.02 M 25. what is the approximate pH of 1.2 x 10^-5 M aqueous solution of NaOH?: -
  4. the function of a buffer is to...: resist changes in pH when small amounts ofacid and bases are added 27. calculate the pH of a solution when 15.00 mL of 0.100 M NaOH is added to 30.00 mL of 0.150 M weak acid, HA. Ka = 4.75 x 10^-6: 5.
  1. the temperature program for a separation starts at a temperature of 50C and ramps the temperature up to 270C at a rate of 10*C/min. which statementis NOT true for this separation?: strongly retained analytes will give broad peaks
  2. as the temperature of a GC column increases, the of the analyte increases, the retention time , and the peak shapes .: vapor pressure; decreases; sharpen
  3. a 3.7 x 10^-4 M solution of a compound X has an absorbance of 0.542 whenmeasured at 740 nm. assuming a pathlength of 1 cm, calculate compound X's molar absorptivity.: 1443 M-1cm-
  4. an electrode with a fixed potential is the...: reference electrode
  5. a 10.00 mL sample is titrated with 0.50 mL of titrant. the observed ab- sorbance is 0.3219. calculate the corrected absorbance.: 0.

excited-state population. as the temperature of the flame increases, the excited-state population .: increases; increases

  1. which of the following are TRUE for Beer's Law?: (1) absorbance increasesas concentration increases; (2) the molar absorptivity value is chromophore and wavelength specific, (3) the absorption spectrum is a graph showing absorbance changes with wavelength
  2. fluorimeters and UV-vis spectrophotometers have several, but not all, de- sign aspects in common. which, if any, of the following is NOT true.: both havetheir detectors positions at 90* away from the incoming light source
  3. hollow-cathode lamps emit light with very sharp linewidths. which mecha- nisms are responsible for broadening atomic emission line widths?: (1) pres-sure broadening; (2) doppler effect
  4. under what conditions are split and splitless injection used?: (1) split injection is preferred for samples where the analyte of interest constitute >0.1% ofthe sample; (2) splitless injection is preferred for trace analysis of analytes that are <0.01% of the sample 40. a galvanic cell with a large equilibrium constant has a cell potential: -

positive

  1. which of the following statements are true regarding the effect of flame temperature on atomic absorbance and atomic emission spectroscopy?: (1) varying the flame temperature by 10 K hardly affects the ground-state population ofthe analyte and would not noticeably affect the analyte signal in atomic absorption; (2) varying the flame temperature by 10 K affects the excited-state population of theanalyte and will noticeably affect the analyte signal in atomic emission
  2. which is true for the relationship between quencher concentration and fluorescent intensity?: as quencher concentration increases, fluorescent intensitydecreases
  3. for quantitative analysis with gas chromatography...: the area of a peakreported by the instrument for a compound is proportional to the quantity of thatcompound
  4. which of the following is not true about the liquid junctional potential?: itis inversely proportional to the difference between the half-cell potentials
  5. the pH of a standard hydrogen electrode where E* is 0.00 V is...: 7
  6. a chloride ion-selective obeys the equation E = constant - 0,059log[aCl-]. the potential was -0.430 V when the electrode was immersed in 0.100 M NaCl.what is aCl- if E = -0.300 V? assume the activity coefficient of Cl- is unity.: 6.26x 10^-4 M
  1. a potential difference at an interface between a metal and electrolytesolution is due to...: charge transfer
  2. if the standard cell potential is provided, what other data is needed to calculate G*?: half-reactions of the cell
  3. if the Ecell = 0.023 V versus S.C.E., what is the cell potential versus Ag|AgCl?: 0.068 V
  4. the junction 0.10 M HCl / 3.5 M KCl develops a LJP of +3.1 mV at 25*C because...: the mobility of H+ is much higher than the mobility of K+
  5. in the cell Cd(s) | Cd2+ (1 M) || H+ (1 M) | Pt: cations from the salt bridge diffuseinto the right half-cell, and anions from the salt bridge diffuse into the left half-cell
  6. which of the following choices is indicative of a spontaneous reaction,assuming standard conditions?: Keq > 1
  7. in a working galvanic cell, the overall cell reaction is...: spontaneous 63. if the Ecell = 0.222 V w.r.t. S.C.E., what is the cell potential w.r.t. S.H.E.?: -
  9. an electrolytic cell is filled with water. which of the following will movetoward the cathode of such a cell?: H+ ions
  10. the Zn2+ ion interferes with a Ca2+ ion-selective electrode more than the same

activity of Mg2+ does. this means that...: the selectivity coefficient is higherfor Zn2+ than for Mg2+