You design an experiment to show that the reaction between Alka Seltzer and Vinegar is an endothermic reaction . An alka seltzer tablet is added to a solution of vinegar and the temperature is recorded. Your results show that if you increase the number of Alka Seltzer tablets being added to the vinegar, there is a greater change in temperature. What is the independent variable in your reaction? a. If the reaction is endothermic or exothermic.
b. the temperature of the solution.
c. the vinegar.
d. the number of Alka Seltzer tablets.