The hydroxide ion concentration in pure water at 25ºC is NOT equal to 1×10⁷ M
Option D. 1×10⁷ M gives the correct answer to the question.
Water has the following ions
1. Hydrogen ion (H⁺)
2. Hydroxide ion (OH¯)
H₂O <=> H⁺ + OH¯
From the above equation, we can see that water contains equal amount of Hydrogen ion, H⁺ and hydroxide ion, OH¯.
Pure water has a pH of 7 and a pOH of 7.
Thus, the concentration of Hydroxide ion, OH¯ can be obtained as follow:
pOH = 7
Concentration of Hydroxide ion [OH¯] =?
pOH = –Log [OH¯]
7 = –Log [OH¯]
Multiply through by –1
–7 = Log [OH¯]
Take the antilog –7
[OH¯] = antilog (–7)
[OH¯] = 1×10¯⁷ M
From the above illustration, we can conclude that the hydroxide ion concentration in pure water at 25ºC is NOT equal to 1×10⁷ M
Option D. 1×10⁷ M gives the correct answer to the question.
Learn more: https://brainly.com/question/3521999
