9. Protease is used to tenderize meat. 10. Leaving a glass of milk on the table causes it to spoil easily. What I Have Learned '9 TRUE or FALSE: Write I if the statement is true and write E when it is false. Write your answer before each number. 1. Collision theory states that particles have to collide with sufficient energy to react. 2. Starter energy is the minimum amount of energy required for a successful collision. 3. Adding heat will increase the reaction rate. 4. Grains of sugar has a greater surface area than a cube of sugar of the same mass. 5. Usually lowering the temperature will slow down a reaction. Limiting Reactant and Percent Yield What I Need to Know In the previous lesson, you were able to understand how a chemical reaction occurs and what happens in a chemical change. You were able to realize that for a chemical reaction to happen, the reactant particles must collide with enough energy and proper orientation. You also learned that chemical reactions speed up or slow down by the four factors affecting reaction rate. Aside from knowing those concepts, you must also know what limits a chemical reaction, when a chemical reaction stops and how much product forms after a chemical reaction. In this lesson, you will know how to determine the limiting reactant and how to compute for the percent yield. At the end of this lesson, you are expected to