imagine you are in a laboratory. you are exploring the following reaction: a + b → c. when the product c is…

imagine you are in a laboratory. you are exploring the following reaction: a + b → c. when the product c is created, bubbles form. when 10ml of a is added to 10ml of b, the reaction takes twenty seconds. your teacher gives you three unknown substances (x, y, and z), one of which is a catalyst for the reaction. design an experiment to test substances x, y, and z to determine which one is a catalyst for the reaction.

imagine you are in a laboratory. you are exploring the following reaction: a + b → c. when the product c is created, bubbles form. when 10ml of a is added to 10ml of b, the reaction takes twenty seconds. your teacher gives you three unknown substances (x, y, and z), one of which is a catalyst for the reaction. design an experiment to test substances x, y, and z to determine which one is a catalyst for the reaction.

Answer

Explanation:

Step1: Set up control reaction

Conduct the reaction of 10mL of A and 10mL of B without any of the unknown substances and time how long it takes for bubbles to form (recorded as $t_0 = 20$ seconds).

Step2: Test substance X

Add a small, consistent amount (e.g., same mass or volume) of substance X to 10mL of A and 10mL of B. Start the timer as soon as X is added and stop it when bubbles form. Record the time as $t_X$.

Step3: Test substance Y

Repeat the process with substance Y. Add the same - sized amount of Y to 10mL of A and 10mL of B, time the reaction, and record the time as $t_Y$.

Step4: Test substance Z

Repeat the process with substance Z. Add the same - sized amount of Z to 10mL of A and 10mL of B, time the reaction, and record the time as $t_Z$.

Step5: Analyze results

The substance that causes the reaction to occur in the shortest time (compared to $t_0$) and does not get consumed in the reaction (can be recovered in its original form after the reaction) is the catalyst.

Answer:

Conduct the control reaction first. Then add small, equal - sized amounts of X, Y, and Z separately to the reaction of 10mL of A and 10mL of B, time each reaction. The substance that speeds up the reaction (has the shortest reaction time compared to the control) and is not consumed is the catalyst.