Independent Variable: Temperature of the acetylsalicylic acid solution (30.0ºC, 45.0ºC, 60.0ºC, 75.0ºC, 90.0ºC), manipulated using a hot plate and measured using a digital thermometer Dependent Variable: Concentration of salicylic acid in the solution, calculated based on the Beer-Lambert equation and the absorbance of the solution at 521nm as measured by a spectrophotometer Controlled Variables: