Question

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

Answer 1

Answer
$K_{2}O+H_{2}O\to 2KOH$
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 $O{H}^{-}$. We need 1 potassium ion to balance one hydroxide ion making the formula KOH.
$K_{2}O+H_{2}O\to KOH$
To balance the equation we place a coefficient of 2 in front of the potassium hydroxide.
$K_{2}O+H_{2}O\to 2KOH$