Pre-lab Questions for Experiment #7 Colorimetric Determination of an Equilibrium

Question

Pre-lab Questions for Experiment #7 Colorimetric Determination of an Equilibrium Constant in Aqueous Solution 1) (I point) Which of the following statements is incorrect about Beer's Law, A A) A is the absorption or the reading of absorbance; B) c is called the molar extinction coefficient (epsilon); C) c is the molarity of the absorbing species; D) b is the path length of light through the sample; E) Beer's Law is applicable only to visible lights. ocb? Answer: 2) Chlorine dioxide reacts in basic waterto form chlorite and chlorate according to the following chemical equation A kinetic study of this reaction under a certain set of conditions yielded the data below. 0.0500 0.100 0.100 0.100 0.100 0.0500 2.30 x 10 1.15 x 10 Which one of the following is the rate law for this reaction? A) rate k[CIO J[OH] B) rate k[CIO lIOH C) rate k[CIO IOH] D) rate k[CIO IOH Answer: 3) For the overall chemical reaction shown below, which one of the following statements can be rightly assumed? 2Has(g) + Oz(g) 2S(s) + 2H20(1) A) The reaction is third-order overall. B) The reaction is second-order overall. C) The rate law is, rate k[H2S] [O2]. D) The rate law is, rate k[H2S] [O2]. E) The rate law cannot be determined from the information given. Answer:

Explanation / Answer

lambert beer law:

A refers to the absorption

E= molar absorption coefficient

c= molarity of the absorbing specie

b= path length

it is applicable to UV visible absorption spectrometry. Not just for visible radiation.

E) option is incorrect/

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