Simulation: Investigating Reaction Rates Background In this investigation you will investigate the factors that can affect the rate of a chemical reaction. Access the simulation here: teachchemistry. org/reaction-rates Investigate 1. Run the reaction. Record your observations as you examine the effect of each variable. When you record your answer, you MUST write in complete sentences and give SPECIFIC details. You should talk about time for products to form and relate that to reaction rate. You should talk about red and blue reactants vs. purple products. Explain CLEARLY what is happening. Variable Observations Control Temperature Decreased Increased Concentration Decreased.