Question

What is the chemical equation for potassium oxide + water ---> potassium hydroxide?

Answer 1

`"K"_2"O" + "H"_2"O" -> 2"KOH"`

Explanation:

Potassium oxide + water produces potassium hydroxide.

Potassium oxide is an ionic compound. The potassium has a charge of `"K"^+` and oxygen has a charge of `"O"^(2-)`. We need 2 potassium ions to balance one oxide ion making the formula `"K"_2"O"`.

Potassium hydroxide is an ionic compound. The potassium has a charge of `"K"^+` and hydroxide has a charge of `"OH"^-`. We need 1 potassium ion to balance one hydroxide ion making the formula `"KOH"`.

`"K"_2"O" +" H"_2"O" -> "KOH"`

To balance the equation we place a coefficient of 2 in front of the potassium hydroxide.

`"K"_2"O" + "H"_2"O" -> 2"KOH"`

I hope this was helpful.
SMARTERTEACHER