When carrying out the experiment, care has to be taken that other variables that affect the rate of reaction, such as concentration of reactants, are kept constant. These are control variables.

Students will be able to identify and control variables to design an experiment to see whether the temperature of a solvent affects the speed at which a solute dissolves. Students will be able to ...

What Is a Random Variable? A random variable is one whose value is unknown or a function that assigns values to each of an experiment’s outcomes. Random variables are often designated by letters ...