Below Is a Representation of an Aqueous Solution of a Weak

question 28

Multiple Choice

Below is a representation of an aqueous solution of a weak acid HA at equilibrium.(Each circle represents 1.0 ×10^-3 mol of atoms,and the volume of the box is 1.0 L.Solvent water molecules are not shown for clarity.) What is K_a of HA?

• A)1.0 ×10^-6
• B)6.0 ×10^-3
• C)2.5 ×10^-4
• D)3.6 ×10^-5
• E)1.0 ×10^-9

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