a solution of ammonia has a ph of 11.8. what is the concentration of oh⁻ ions in the solution? useful…

a solution of ammonia has a ph of 11.8. what is the concentration of oh⁻ ions in the solution? useful formulas include h₃o⁺=10⁻ph, oh⁻=10⁻poh, ph + poh = 14, and h₃o⁺oh⁻=10⁻¹⁴. o 1.58×10⁻¹² m o 6.31×10⁻³ m o 2.20 m o 158 m

a solution of ammonia has a ph of 11.8. what is the concentration of oh⁻ ions in the solution? useful formulas include h₃o⁺=10⁻ph, oh⁻=10⁻poh, ph + poh = 14, and h₃o⁺oh⁻=10⁻¹⁴. o 1.58×10⁻¹² m o 6.31×10⁻³ m o 2.20 m o 158 m

Answer

Explanation:

Step1: Calculate pOH

Given pH + pOH = 14, and pH = 11.8. So pOH=14 - pH. pOH = 14 - 11.8 = 2.2

Step2: Calculate [OH⁻]

Use the formula [OH⁻]=10⁻ᵖᴼᴴ. Substitute pOH = 2.2 into the formula. [OH⁻]=10⁻².² [OH⁻]=6.31×10⁻³ M

Answer:

6.31×10⁻³ M