(Equation 1) NH4Cl(s)(arrows)NH4(aq)+Cl(aq) -Rewrite equation 1 to include heat
ID: 916862 • Letter: #
Question
(Equation 1) NH4Cl(s)(arrows)NH4(aq)+Cl(aq)
-Rewrite equation 1 to include heat as a reactant or a product
-Write the mass action expression for the equation 1 equilibrium (K=)
-Write a chemical equation for the saturated solution of calcium chloride. Use equation 1 as a model, include heat in the equation.
-Write the mass action expression for this solution of calcium chloride
-Will the addition of sodium chloride cause the formation of more solid or more aqueous calcium chloride? Explain in terms of stressors and shifting equilibrium.
Explanation / Answer
1)
NH4Cl(s) + Heat ---> NH4(aq)+Cl(aq)
It required heat, it is endothermic process
2)
K = [NH4+][Cl-]/[NH4Cl] = [NH4+][Cl-]
since all solid have activity = 1
3)
CaCl2 + Heat < ---> Ca+2 and 2Cl- (saturation/equilibrium)
4)
Adding NaCl will super saturate Cl- in solution, threfore, CaCl2 might be expected to precipitate as a solid.
The equilibrium is shifted to the reactants (solids)
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