Question

An/a_____ solution with a ph of 9.82 has a hydroxide concentration of______M.

A. Basic,1.51x10^-10
B. Neutral,1.51x10^10
C. Basic,6.61x10^-5
D. Acidic,6.61x10^-5

Answer 1

A basic solution with PH of 9.82 has a hydroxide concentration of 1.51 x10^-10 M

The solution is basic since the PH is greater than 7 while the concentration is calculated as follows

Ph = -log (h+)
therefore -log(H+) = 9.82

H+ =10^- 9.82= 1.51 x10^-10

Answer 2

Answer:
A Basic solution with a ph of 9.82 has a hydroxide concentration of 6.60 × 10⁻⁵ M.

Step-by-step explanation:
As we know,
When,
pH = 7 (The Solution is Neutral)

pH < 7 (The Solution is Acidic)

pH > 7 (The Solution is Basic)

So, as given pH 9.82 is greater than 7, Hence, it is basic.
As we known,

pH + pOH = 14

pOH = 14 - 9.82

pOH = 4.18

Concentration is calculated by taking Antilog,

[OH⁻] = 10^-pOH

[OH⁻] = 10^-4.18

[OH⁻] = 6.60 × 10⁻⁵