Question

11. Indicate whether each of the following aqueous solutions is acidic, basic, or neutral: KI, KF, HF.

Answer 1

Q11. Correct answers are

• KI $\small \rightarrow$ neutral
• KF $\small \rightarrow$ basic
• HF $\small \rightarrow$ acidic

Explanation

Compound KI is potassium iodide and it is made by reaction between strong base potassium hydroxide (KOH) and strond acid hydroiodic acid (HI). The resulting compound KI, is a neutral ionic salt.

Compound KF is potassium fluoride and it is made by reaction between strong base potassium hydroxide (KOH) and weak acid hydrofluoric acid (HF). The resulting compound KF, is a basic ionic salt as a strong base is used which is dominant in the salt.

Compound HF is a weak acid which gives hydronium ions in aqueous solution which decreases the pH of the solution.