EBK EXPLORING CHEMICAL ANALYSIS
EBK EXPLORING CHEMICAL ANALYSIS
5th Edition
ISBN: 8220101443908
Author: Harris
Publisher: MAC HIGHER
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Chapter 2, Problem 2.12P
Interpretation Introduction

Interpretation:

Water was drained from a burette between the 0.12 - 15.78 mL marks.  The apparent volume was 15.78-0.12 = 15.66mL, measured in air at 25 oC, the mass of water delivered was 15.569 g.  The true volume has to be found.

Concept Introduction:

True mass:

The true mass of an object is a measure of its inherent inertia, and this is independent of buoyancy.  The true mass can be determined by weighing in a vacuum without buoyant forces.

The true mass can be determined by the formula:

    m = m'(1-dadw)/(1-dad)m = true massm'= mass measured in airda= density of air (0.0012g/mL near 1bar and 25 oC)dw= density of balance weights (8.0g/mL)d = density of object being weighed

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6. Consider the following exothermic reaction below. 2Cu2+(aq) +41 (aq)2Cul(s) + 12(aq) a. If Cul is added, there will be a shift left/shift right/no shift (circle one). b. If Cu2+ is added, there will be a shift left/shift right/no shift (circle one). c. If a solution of AgNO3 is added, there will be a shift left/shift right/no shift (circle one). d. If the solvent hexane (C6H14) is added, there will be a shift left/shift right/no shift (circle one). Hint: one of the reaction species is more soluble in hexane than in water. e. If the reaction is cooled, there will be a shift left/shift right/no shift (circle one). f. Which of the changes above will change the equilibrium constant, K?
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