Question

For the following concentrations determine if the solutions are acidic , basic or neutral and select the best answer from the subsequent choices.

a. [H₃O⁺] = 0.0115 M

b. [OH⁻] = 0.45 M

c. [OH⁻] = 1.25 * 10⁻¹⁰ M

a) All Acidic
b) All Basic
c) a= Acidic , b = Basic , c = Basic
d) a= Acidic , b = Basic , c = Acidic
e) a= Basic , b = Acidic , c = Acidic

Answer 1

After comparing the ion concentrations to the neutral ion concentration (1 × 10^-7 M), it is determined that answer choice d) a = Acidic, b = Basic, c = Acidic is correct, with solution a being acidic, solution b being basic, and solution c being acidic as well.

Step-by-step explanation:

To determine if the solutions are acidic, basic, or neutral, we will compare the given hydronium ion concentration ([H3O+]) and hydroxide ion concentration ([OH-]) to the neutral ion concentration, which is 1 × 10-7 M.

• a. [H3O+] = 0.0115 M: The concentration is greater than 1 × 10-7 M, indicating an acidic solution.
• b. [OH-] = 0.45 M: To find the corresponding [H3O+], we use the formula [H3O+] = Kw / [OH-]. Since [OH-] > 1 × 10-7 M, the solution will be basic.
• c. [OH-] = 1.25 × 10-10 M: Similarly, using the formula, we find that [H3O+] will be greater than 1 × 10-7 M, indicating an acidic solution.

Based on the analysis:

1. a = Acidic
2. b = Basic
3. c = Acidic

Thus, the correct answer is d) a = Acidic, b = Basic, c = Acidic.