The following photo shows the element potassium reacting with water to form the element hydrogen, a gas, and a solution of the compound potassium hydroxide. 

(a) What states of matter are involved in the reaction? 

(b) Is the observed change chemical or physical? 

(c) What are the reactants in this reaction, and what are the products? 

(d) What qualitative observations can be made concerning this reaction?

Transcribed Image Text:

Cengage Learning/Charles D. Winters Potassium reacting with water to produce hydrogen gas and potassium hydroxide.