Question
In the equilibrium system CH3COOH(aq) + H2O(l) —> — H3O+ CH3COO-(aq)
.<—
Which species is present in the highest concentrations at equilibrium?
A. CH3COOH
B. H3O
C. CH3COO-
D. Equal concentrations of CH3COOH, H3O+, And CH3COO- are present
.<—
Which species is present in the highest concentrations at equilibrium?
A. CH3COOH
B. H3O
C. CH3COO-
D. Equal concentrations of CH3COOH, H3O+, And CH3COO- are present
Answers
Is A correct?
CH3COOH = HAc
HAc is a weak acid; therefore, it has an ionization constant, Ka. Look up that Ka value, write the Ka expression, and assuming a value of, say, 0.1M or HAc initially, you can calculate the three species and know the answer.
.........HAc + H2O <==> H3O^+ + Ac^-
I........0.1.............0.......0
C........-x..............x.......x
E......0.1-x.............x.......x
Where I is initial, C is change, and E is equilibrium.
Post your work if you get stuck.
HAc is a weak acid; therefore, it has an ionization constant, Ka. Look up that Ka value, write the Ka expression, and assuming a value of, say, 0.1M or HAc initially, you can calculate the three species and know the answer.
.........HAc + H2O <==> H3O^+ + Ac^-
I........0.1.............0.......0
C........-x..............x.......x
E......0.1-x.............x.......x
Where I is initial, C is change, and E is equilibrium.
Post your work if you get stuck.
Yes, A is correct but do you know WHY it is correct or are you guessing?
hi