Chemistry
Chemistry
4th Edition
ISBN: 9780393919370
Author: Thomas R. Gilbert
Publisher: NORTON
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Question
Chapter 17, Problem 17.31QP

(a)

Interpretation Introduction

To determine: The initial concentration of Ni(NO3)2 in the solution.

Interpretation: The initial concentration of Ni(NO3)2 in the solution is to be calculated.

Concept introduction: The concentration is calculated by the formula,

Concentration =NumberofmolesVolume

The concentration is expressed in mol/L.

(a)

Expert Solution
Check Mark

Answer to Problem 17.31QP

The initial concentration of Ni(NO3)2 in the solution is 0.00100M_.

Explanation of Solution

The total volume of the solution is 1L.

The number of moles of Ni(NO3)2 is 0.00100mol.

The number of moles of NH3 is 0.500mol.

A solution is prepared from Ni(NO3)2 and NH3.

The initial concentration of Ni(NO3)2 in the solution is calculated by the formula,

ConcentrationofNi(NO3)2 =NumberofmolesofNi(NO3)2Volumeofsolution

The concentration is expressed in mol/L.

Substitute the concentration of Ni(NO3)2 and volume of solution in the above expression.

[Ni(NO3)2]=0.00100mol1L=0.00100M_

Therefore, the initial concentration of Ni(NO3)2 in the solution is 0.00100M_.

(b)

Interpretation Introduction

To determine: The concentration of Ni2+ in the solution at the equilibrium.

Interpretation: The concentration of Ni2+ in the solution at the equilibrium is to be calculated.

Concept introduction: The constant for the complex ion formation in the equilibrium is known as the formation constant. It is denoted by Kf.

The concentration at the equilibrium is calculated by the expression,

Kf=[Products]equil[Reactants]equil

(b)

Expert Solution
Check Mark

Answer to Problem 17.31QP

The concentration of Ni2+ in the solution at the equilibrium is 1.25×1010M_.

Explanation of Solution

The number of moles of Ni(NO3)2 is 0.00100mol.

The number of moles of NH3 is 0.500mol.

The reaction of Ni2+ and NH3 is,

Ni2+(aq)+6NH3(g)[Ni(NH3)6]2+ (1)

The ICE Table for the above reaction is below.

[Ni2+](M)[NH3](M)[Ni(NH3)6]2+(M)Intial0.001000.5000Change0.00100x0.5006(0.00100)+0.00100Equilibrium(0.00100x)x0.4940.00100

The equilibrium constant for the equation (1) is,

Kf=[Ni(NH3)6]2+[Ni2+][NH3]6

The value of equilibrium constant for [Ni(NH3)6]2+ is 5.5×108M.

Substitute the values of equilibrium concentrations from the above Table in the above expression.

5.5×108M=(0.00100(x)×(0.494)6)Mx=0.00100(5.5×108)×(0.494)6=1.25×1010M_

Therefore, the concentration of Ni2+ in the solution at the equilibrium is 1.25×1010M_.

Conclusion

  1. a. The initial concentration of Ni(NO3)2 in the solution is 0.00100M_.
  2. b. The concentration of Ni2+ in the solution at the equilibrium is 1.25×1010M_.

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Chapter 17 Solutions

Chemistry

Ch. 17 - Prob. 17.5VPCh. 17 - Prob. 17.6VPCh. 17 - Prob. 17.7VPCh. 17 - Prob. 17.8VPCh. 17 - Prob. 17.9VPCh. 17 - Prob. 17.10VPCh. 17 - Prob. 17.11QPCh. 17 - Prob. 17.12QPCh. 17 - Prob. 17.13QPCh. 17 - Prob. 17.14QPCh. 17 - Prob. 17.15QPCh. 17 - Prob. 17.16QPCh. 17 - Prob. 17.17QPCh. 17 - Prob. 17.18QPCh. 17 - Prob. 17.19QPCh. 17 - Prob. 17.20QPCh. 17 - Prob. 17.21QPCh. 17 - Prob. 17.22QPCh. 17 - Prob. 17.23QPCh. 17 - Prob. 17.24QPCh. 17 - Prob. 17.25QPCh. 17 - Prob. 17.26QPCh. 17 - Prob. 17.28QPCh. 17 - Prob. 17.29QPCh. 17 - Prob. 17.30QPCh. 17 - Prob. 17.31QPCh. 17 - Prob. 17.32QPCh. 17 - Prob. 17.33QPCh. 17 - Prob. 17.34QPCh. 17 - Prob. 17.35QPCh. 17 - Prob. 17.36QPCh. 17 - Prob. 17.37QPCh. 17 - Prob. 17.38QPCh. 17 - Prob. 17.39QPCh. 17 - Prob. 17.40QPCh. 17 - Prob. 17.41QPCh. 17 - Prob. 17.42QPCh. 17 - Prob. 17.43QPCh. 17 - Prob. 17.44QPCh. 17 - Prob. 17.45QPCh. 17 - Prob. 17.46QPCh. 17 - Prob. 17.47QPCh. 17 - Prob. 17.48QPCh. 17 - Prob. 17.49QPCh. 17 - Prob. 17.50QPCh. 17 - Prob. 17.51QPCh. 17 - Prob. 17.52QPCh. 17 - Prob. 17.53QPCh. 17 - Prob. 17.54QPCh. 17 - Prob. 17.55QPCh. 17 - Prob. 17.56QPCh. 17 - Prob. 17.57QPCh. 17 - Prob. 17.58QPCh. 17 - Prob. 17.59QPCh. 17 - Prob. 17.60QPCh. 17 - Prob. 17.61QPCh. 17 - Prob. 17.62QPCh. 17 - Prob. 17.63QPCh. 17 - Prob. 17.64QPCh. 17 - Prob. 17.65QPCh. 17 - Prob. 17.66QPCh. 17 - Prob. 17.67QPCh. 17 - Prob. 17.68QPCh. 17 - Prob. 17.69QPCh. 17 - Prob. 17.70QPCh. 17 - Prob. 17.71QPCh. 17 - Prob. 17.72QPCh. 17 - Prob. 17.73QPCh. 17 - Prob. 17.74QPCh. 17 - Prob. 17.75QPCh. 17 - Prob. 17.76QPCh. 17 - Prob. 17.77QPCh. 17 - Prob. 17.78QPCh. 17 - Prob. 17.79QPCh. 17 - Prob. 17.80QPCh. 17 - Prob. 17.81QPCh. 17 - Prob. 17.82QPCh. 17 - Prob. 17.83QPCh. 17 - Prob. 17.84QPCh. 17 - Prob. 17.85APCh. 17 - Prob. 17.86APCh. 17 - Prob. 17.87APCh. 17 - Prob. 17.88APCh. 17 - Prob. 17.89APCh. 17 - Prob. 17.90APCh. 17 - Prob. 17.91AP
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