Question

(1 pts)
2. a. If you believe that you have a water sample that is contaminated with barium, what
could you add to it to test it?
Choose...
A.) potassium nitrate
B.) potassium sulfate
C.) potassium chloride
D.) potassium hydroxide

Answer 1

B.) Potassium sulfate :)

Barium reacts with potassium sulfate, barium forms an insoluble white precipitate when sulfate anion is added.

Answer 2

If you believe that you have a water sample that is contaminated with barium, you could add potassium sulfate (B) to confirm it.

We suspect that a water sample is contaminated with water. If barium were present, it would be as aqueous Ba²⁺.

Let's consider what we could add to test its presence.

A.) potassium nitrate

Ba²⁺ and KNO₃ would form colorless aqueous Ba(NO₃)₂, so we wouldn't be able to identify the presence of Ba²⁺.

B.) potassium sulfate

Ba²⁺ and K₂SO₄ would form a white precipitate of BaSO₄. Thus, we could use potassium sulfate to detect Ba²⁺.

C.) potassium chloride

Ba²⁺ and KCl would form colorless aqueous BaCl₂, so we wouldn't be able to identify the presence of Ba²⁺.

D.) potassium hydroxide

Ba²⁺ and KOH would form colorless aqueous Ba(OH)₂, so we wouldn't be able to identify the presence of Ba²⁺.

If you believe that you have a water sample that is contaminated with barium, you could add potassium sulfate (B) to confirm it.

Learn more: https://brainly.com/question/17474595