NY Regents Chemistry Exam Jan 2023
47. Which aqueous solution is the best conductor of an electrical current? (1) 0.1 M NaNO3
(2) 0.2 M NaNO3 (3) 0.01 M NaNO3
(4) 0.02 M NaNO3
Solution: Electrical current is conducted through the movement of charged particles. The more charged particles there are, the more electrical current will be generated. Molarity (M) represents the concentration of solute in solution. NaNO3 is an ionic solution that will dissociate into ions when dissolved in water, Na+ and NO3-. The solution with the highest molarity will be the best conductor of an electrical current. Choice 2 is the correct answer choice.