Question

CHEM 101L Final Exam Review Fall 2019 The figure below is from a titration experiment performed following the same procedure used in lab 4. Use it to answer the following questions: Monitoring Titration of Silver Nitrate with Lithium Chloride y = 35.4x - 297 R2 = 0.9894 Conductivity (us/cm) Y = -33.1x + 291 R? = 0.9996 0.00 2.00 4.00 (8.72 ml, o us/cm) 6.00 8.00 10.00 12.00 14.00 Titrant added (mL) 16.00 47. Calculate the endpoint of the reaction a. O us/cm b. 8.72 ml C. 8.58 ml d. 6.87 uS/cm 48. If the experimenter made a mistake and put lithium chloride in the beaker and silver nitrate in the buret how would the slope of the first and second lines change? c. The slope of first line would be negative and the slope of the second line would be positive d. The slope of first line would be negative and the slope of the second line would be negative e. The slope of first line would be positive and the slope of the second line would be positive f. The slope of first line would be positive and the slope of the second line would be negative 49. When a species gets reduced it... a. Loses electrons b. Gains electrons C. Loses hydrogen d. Gains hydrogen Experiment 6: Thermochemistry

Answer 1

Q47:

When two lines coincides , that would be the equivalent point.

y = -33.1x + 291 = 35.4x - 297

x = 588/68.5 = 8.58 ml

y = -33.1×8.58 + 291 = 6.87 $\mu$ S/cm

Answer: (c) , (d)

Q48:

Slope of first line would be negative and slope of second line would be positive .

Answer: (c)

Q49:

When a species gets reduced it ....Gains electrons and gains hydrogen .

Answer : (b) , (d)