The metals in groups 1a, 2a, and 3a select one: a. gain electrons when they form ions b. all form ions with a negative charge c. all have ions with a 1mc040-1.jpg charge d. lose electrons when they form ions

When hydrogen peroxide (h2o2) is added to potassium iodide (ki) solution, the hydrogen peroxide decomposes into water (h2o) and oxygen (o2). the chemical equation for the decomposition reaction is: 2h2o2—> 2h2o + o2. what is the role of the potassium iodide in this reaction? a. reactant. b. product. c. precipitate. d. catalyst.