As discussed in class, water plays an important biological role and therefore knowing the properties of water plays a role in un derstanding pH and its impact on biological structures. The ionization constant for water, Kw, is 1.14 x 10–15 at 0 °C and 9.6 x 10–14 at 60 °C. Determine the pH of water at 60 °C.
2 answers:
Answer:
Explanation:
H2O --> H+ + OH-
Ka = [H+][OH-]/[H2O]
Ka × [H2O] = Kw
Kw = [H+] × [OH-]
[H+] = [OH-] = x
Therefore,
9.6 x 10^-14 = x^2
x = 3.098 × 10^-7
[H+] = 3.098 × 10^-7 M
pH = -log[H+]
= -log [3.098 × 10^-7]
= 6.51
Answer:
6.5
Explanation:
Since pure water is neutral, the hydrogen ion concentration equals the hydroxide ion concentration.
[H⁺] = [OH⁻] and pK = pH + pOH. Since [H⁺] = [OH⁻], pH = -log[H⁺] = pOH = -log[OH⁻].
So, pK = 2pH and K = ionisation constant for water at 60 °C = 9.6 × 10⁻¹⁴
pH = pK/2 = -logK/2 = - log(9.6 × 10⁻¹⁴)/2 = (14 - log9.6)/2 = 6.5
So, pH of water at 60 °C is 6.5
You might be interested in
Answer:
Evaporation and condensation are two processes through which matter changes from one state to another.
Explanation:
There are no above options to choose from so I am giving an example of a X3Y2 formula which is Magnesium nitride, the formula is Mg3N2.
Answer:
hydroxide ion
Explanation:
I took the quiz
Answer:
the value of H° is below -6535 kj. +6H2O
Explanation:
6H2O answer solved
Your answer is D. 8 16 = 2^4 72 = 2^3*3^2 So you'll choose 2^3 = 8