Final answer:
The hydronium ion concentration is 5.0 x 10^-3 M, and the hydroxide ion concentration is also 5.0 x 10^-3 M.
Step-by-step explanation:
The hydronium ion concentration in a solution can be calculated using the given molarity of the acid. In this case, the solution is 5.0 x 10-3 M H2SO4. Since sulfuric acid is a strong acid, it dissociates completely in water. So the hydronium ion concentration is equal to the molarity of the acid: 5.0 x 10-3 M.
On the other hand, the hydroxide ion concentration in a solution can be calculated using the equation KW = [H3O+][OH-], where KW is the ion product of water (1.0 x 10-14 at 25°C). Since the hydronium and hydroxide ion concentrations are equal in a neutral solution, the hydroxide ion concentration is also 5.0 x 10-3 M.