Simplify the following text for a Grade 12 native English-speaking person.
Original: Iron ( III ) sulfate is produced on a large scale by reacting sulfuric acid , a hot solution of ferrous sulfate , and an oxidizing agent ( such as nitric acid or hydrogen peroxide ) .
Simplified: It is made by mixing sulfuric acid , iron ( II ) sulfate , and an oxidizing agent like nitric acid or hydrogen peroxide together .