The researcher changed the concentration of sodium thiosulfate in each group. So, is the concentration the independent variable or the dependent variable in this experiment?

Answer 1

In this experiment, the concentration of sodium thiosulfate is the independent variable. The independent variable is the variable that is changed or manipulated by the researcher in the experiment. In this case, the researcher changed the concentrations of sodium thiosulfate which influences the rate of the reaction being observed. The dependent variable, on the other hand, is the variable that is directly affected by the independent variable and is measured as the outcome of the experiment.