Question

There are four unknown compounds that are labeled W, X, Y, and Z. Only substance Y is soluble in water. Compound Y could be

1)iron oxide.

2)zinc hydroxide.

3)potassium bromide.

4)silver oxide.

Answer 1

The correct answer is 3 = potassium bromide.

Step-by-step explanation:

Hello! Let's solve this!

To know if a substance is soluble in water, we have to know if they are polar. Substances that are soluble in water can dissolve and become an anion (negative charge) and a cation (positive charge).

In this case, potassium bromide when dissolved in water forms the anion bromide Br-

and the potassium cation K +.

The correct answer is 3 = potassium bromide.

Answer 2

Potassium bromide

Step-by-step explanation:

Potassium bromide is an ionic compound and it is freely soluble in water as water is polar solvent (with high dielectric constant) so can easily dissolve polar or ionic compounds in it.

"Like dissolved like"

for other compounds they are not soluble in water,

Zinc hydroxide is slightly soluble in water, but very less soluble as compared to potassium bromide.