Question

What is the concentration of OH⁻ in a 0.083 M NaOH solution?

1) 8.30 × 10¹² M
2) 7 M
3) 1.21 × 10⁻¹³ M
4) 0.083 M
5) 8.30 × 10⁻¹⁶ M

Answer 1

The concentration of OH⁻ in a 0.083 M NaOH solution is 0.083 M.

Step-by-step explanation:

To determine the concentration of OH⁻ in a 0.083 M NaOH solution, we need to remember that NaOH dissociates completely in water. The equation for this reaction is:

NaOH → Na⁺ + OH⁻

Since NaOH dissociates into one Na⁺ ion and one OH⁻ ion, the concentration of OH⁻ in the solution is also 0.083 M. Therefore, the correct answer is 4) 0.083 M.