- Homework Solutions
- Homework Questions & Answers
1) As a definition we have that hydrolysis is when the water molecule and the reactive molecule are divided into a reaction and its parts are part of another molecule.
A dissociation is when a molecule divides upon contact with water, and a hydration is when the entire water molecule begins to be part of another molecule.
2) In water, the salts dissociate to form ions (completely or incompletely depending on the respective solubility constant, Ks).
The hydrolysis involving ionic compounds can be illustrated by the chemical changes that occur in an aqueous solution of the sodium acetate salt.
3) The temperature directly affects the hydrolysis of a substance, in addition to the equilibrium constant of solubility, acidity, etc., which is respective of each molecule also affects its decomposition.
5) The F- has a greater hydrolysis constant, therefore the substance that is more prone to suffer it, according to the reaction:
F- + H2O = HF + OH-
Second the NH4 +, of the form:
NH4 + + H2O = NH3 + H3O +
The generic expression to calculate the concentration of OH- produced by the hydrolysis of F- and H3O + produced by NH4 +:
[OH- or H3O +] = √ (Kb or Ka) * 0.1 M
[OH-] = √1.39x10 ^ -11 * 0.1 = 1.18x10 ^ -6 M
pOH = - log 1.18x10 ^ -6 = 5.93
pH = 14 - 5.93 = 8.07
For NH4 +:
[H3O +] = √5.6x10 ^ -10 * 0.1 = 7.48x10 ^ -6
pH = - log 7.48x10 ^ -6 = 5.13
6) By manipulating the variables that affect hydrolysis, such as temperature, it can be favored or delayed.
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