Here it says complete imbalance the following equation. So what is that? Well, this is sodium peroxide because if we broke it back down into its representative elements or representative ions, we have sodium ion and the peroxide ion.

Remember, when a peroxide reacts with water, we're going to create our hydroxide. So, sodium hydroxide and what else? Hydrogen peroxide, H₂O₂. All we have to do now is balance it out. So we throw a 2 here and we throw a 2 here.

Doing that will give us an overall balance equation with two sodiums on both sides, 4 oxygens on both sides, 4 hydrogens on both sides. So this would be our final balance equation.