In the reaction 2H2O (l) + 2Cl - (aq) → H2 (g) + Cl2 (g) + 2OH - (aq), how many electrons are transferred?

A. 0

B. 1

C. 2

D. 3

E. None of the Above (This is not a redox reaction.)

C. 2

2H_2O + 2e^ (-) → H_2 + 2OH^ (-)

2Cl^ (-) → Cl_2 + 2e^ (-)

2H_2O + Cl^ (-) + 2e^ (-) → H_2 + Cl_2 + 2OH^ (-) + 2e^ (-)

2H_2O + 2Cl^ (-) → H_2 + Cl_2 + 2OH^ (-)

This is a redox reaction in which two chloride ions transfer two electrons to two molecules of water.