select the correct answer.\na solution has a ph of 4.20. using the relationship between ph and poh, what is…

select the correct answer.\na solution has a ph of 4.20. using the relationship between ph and poh, what is the concentration of oh⁻?\na. 9.9×10⁻¹ m\nb. 6.2×10⁻¹ m\nc. 6.3×10⁻⁵ m\nd. 6.7×10⁻⁶ m\ne. 1.6×10⁻¹⁰ m

select the correct answer.\na solution has a ph of 4.20. using the relationship between ph and poh, what is the concentration of oh⁻?\na. 9.9×10⁻¹ m\nb. 6.2×10⁻¹ m\nc. 6.3×10⁻⁵ m\nd. 6.7×10⁻⁶ m\ne. 1.6×10⁻¹⁰ m

Answer

Explanation:

Step1: Calculate pOH

We know that pH + pOH = 14. Given pH = 4.20, then pOH=14 - pH. pOH = 14 - 4.20 = 9.80

Step2: Calculate [OH⁻]

The formula for pOH is pOH = -log[OH⁻]. So, [OH⁻]=10⁻ᵖᴼᴴ. [OH⁻]=10⁻⁹.⁸⁰≈1.6×10⁻¹⁰ M

Answer:

E. 1.6×10⁻¹⁰ M