Question

The graph shown below is a common one that you will see several times, or something very close to it, as you go through the year in this Chemistry course. It is comparing the volume of an acid added to a solution to find the equivalence point.The equivalence point is where the concentration of hydrogen ions is equal to the concentration of hydroxide ions; hence the term equivalence point. In the graph below, what is the dependent variable and what is the independent variable? A) The volume added in cm' is the Dependent variable. The pH of the solution is the independent variable. B) It cannot be decide because there is too little information to determine variables. C) The pH of the solution is the Dependent variable and the volume of acid in cm is the Independent variable. D) The equivalence point is the Independent variable and the pll of the solution is the Dependent variable.

Answer 1

The pH of the solution is the Dependent variable and the volume of acid in cm is the Independent variable.(C)

Step-by-step explanation:

In this graph, the volume of acid added (in cm) is the independent variable, as it's manipulated or controlled by the experimenter. The pH of the solution, dependent on the volume of acid added, responds to changes in the independent variable. (C)

As more acid is added, the pH changes, reflecting the relationship between the volume of acid and the resulting pH value. The pH, being influenced by the manipulated variable (volume of acid added), is therefore the dependent variable as it depends on changes in the volume of acid to exhibit variations in its values.

The equivalence point is a significant aspect of the graph, representing the point where the pH changes rapidly, indicating the solution's neutralization. However, it is not an independent or dependent variable; instead, it is an important feature on the graph indicating the point of chemical equivalence between acid and base but doesn't fit the criteria for an independent or dependent variable.