Final answer:
A water-based solution with more positive hydrogen ions than negative hydroxide ions is an acidic solution because its hydronium ion concentration is greater than 1.0 × 10-7M which corresponds to a pH of less than 7.
Step-by-step explanation:
A water-based solution with more positive hydrogen ions than negative hydroxide ions is an acidic solution. According to the provided information, acidic solutions have hydronium ion ([H3O+]) molarities greater than 1.0 × 10-7 M. This corresponds to a pH value less than 7.00 since the pH scale is inversely related to the concentration of hydronium ions in a solution. Basic solutions, in contrast, have hydronium ion molarities less than 1.0 × 10-7 M and correspond to pH values greater than 7.00.
When a salt is dissolved in water, it can lead to a neutral, acidic, or basic aqueous solution depending on the acid-base properties of its component ions. Therefore, a solution with more positive hydrogen ions than negative hydroxide ions is an acidic solution, option (a).