Multiple Choice
In aqueous solution, is potassium perbromate, , expected to produce an acidic, basic, or neutral solution?
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17. Acid and Base Equilibrium
Ionic Salts
Multiple Choice
In aqueous solution, is sodium perbromate, , expected to be acidic, basic, or approximately neutral?
A
Basic because is a polyatomic anion that always hydrolyzes water to form
B
Basic because is the conjugate base of a weak acid
C
Acidic because donates to water
D
Approximately neutral (neither appreciably acidic nor basic)
Verified step by step guidance1
Identify the species present in aqueous solution: sodium perbromate consists of Na⁺ (sodium ion) and BrO₄⁻ (perbromate ion).
Recall that Na⁺ is a cation from a strong base (NaOH) and generally does not affect the pH of the solution, so it is considered neutral.
Consider the perbromate ion (BrO₄⁻), which is the conjugate base of perbromic acid (HBrO₄). Since HBrO₄ is a strong acid, its conjugate base BrO₄⁻ is very weak and does not significantly hydrolyze water.
Because BrO₄⁻ does not appreciably react with water to produce OH⁻ or H₃O⁺, the solution will not be noticeably basic or acidic due to this ion.
Combine these points to conclude that the aqueous solution of sodium perbromate is approximately neutral, as neither ion affects the pH significantly.
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