Respuesta :

Edufirst

Answer:

  • 8.3

Explanation:

1) Data:

a) [OH⁻] = 2.1 × 10⁻⁶ M . . .  (the symbol g shown in the question is a typo)

b) pH = ?

2) Formulae:

  • pH + pOH = 14

  • pOH = log 1 /[OH⁻]

3) Solution:

  • pOH = log ( 1 / 2.1 × 10⁻⁶ ) = 5.7
  • pH = 14 - pOH = 14 - 5.7 =  8.3

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