Two students set up the equilibrium system below.
CH3COOC2H5 (l) + H2O (l) C2H5OH (l) + CH3COOH (l)
The students titrated samples of the equilibrium mixture with sodium hydroxide, NaOH(aq), to determine the concentration of CH3COOH. The students used their results to calculate a value for Kc. The students’ values for Kc were different.
Which of the reason(s) below could explain why the calculated values for Kc were different?
1. Each student carried out their experiment at a different temperature.
2. Each student used a different concentration of NaOH (aq) in their titration.
3. Each student titrated a different volume of the equilibrium mixture.