Chapter 19, Problem 19.148P

(a)

Interpretation Introduction

Interpretation:

Value of $\left[{\text{Co}}^{\text{2+}}\right]$ and $\left[{\text{EDTA}}^{\text{4-}}\right]$ have to be calculated when $\text{25}\text{.0}\text{ml}$ $\text{0}\text{.050}\text{M}$ of $\left[{\text{EDTA}}^{\text{4-}}\right]$ is added to $\text{50}\text{.0}\text{ml}$ of $\text{0}\text{.048}\text{M}$ $\left[{\text{Co}}^{\text{2+}}\right]$ during titration.

Concept Introduction:

Chemical Equilibrium:

Chemical equilibrium is the process where the rate of forward reaction and the rate of backward reaction are equal.

Titration:

Titration is a quantitative chemical analysis to determine the concentration of an identified analyte.  The titrant is the reagent which is prepared as a standard solution of known concentration volume.  The titrant reacts with the analyte to determine the analyte’s concentration.  The volume of the titrant reacting with analyte is called the titration volume.

Formation constant:

A stability constant or formation constant is an equilibrium constant for the formation of a complex ion in the solution and it measures the strength of interaction between the reactants that forms the complex.

(b)

Interpretation Introduction

Interpretation:

Value of $\left[{\text{Co}}^{\text{2+}}\right]$ and $\left[{\text{EDTA}}^{\text{4-}}\right]$ have to be calculated when $\text{75}\text{.0}\text{ml}\text{0}\text{.050}\text{M}$ of $\left[{\text{EDTA}}^{\text{4-}}\right]$ is added to $\text{50}\text{.0}\text{ml}$ of  $\text{0}\text{.048}\text{M}$ $\left[{\text{Co}}^{\text{2+}}\right]$ during titration.

Concept Introduction:

Chemical Equilibrium:

Chemical equilibrium is the process where the rate of forward reaction and the rate of backward reaction are equal.

Titration:

Titration is a quantitative chemical analysis to determine the concentration of an identified analyte. The titrant is the reagent which is prepared as a standard solution of known concentration volume. The titrant reacts with the analyte to determine the analyte’s concentration. The volume of the titrant reacting with analyte is called the titration volume.

Formation constant:

A stability constant or formation constant is an equilibrium constant for the formation of a complex ion in the solution and it measures the strength of interaction between the reactants that forms the complex.