Answer:
A) Acidic
B) Basic
Step-by-step explanation:
a. To find the pH of a solution with a hydrogen ion concentration of [H^+] = 2.3 × 10^-3, we can use the following equation:
⇒ pH = -log[H+]
Substituting the given value of [H^+], we get:
⇒ pH = -log(2.3 × 10^-3) ≈ 2.64
Since this pH value is less than 7, the solution is acidic.
b. To find the pH of a solution with a hydroxide ion concentration of [OH^-] = 2.3 × 10^-3, we can first find the hydrogen ion concentration using the following equation:
⇒ Kw = [H+][OH^-] = 1.0 × 10^-14
⇒ [H+] = Kw/[OH^-] = (1.0 × 10^-14)/(2.3 × 10^-3) ≈ 4.35 × 10^-12
Then, we can find the pH using the equation from part (a):
⇒ pH = -log[H+] = -log(4.35 × 10^-12) ≈ 11.36
Since this pH value is greater than 7, the solution is basic.