Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2 satisfies the equilibrium equation
CO2(gas)<------>CO2(aq) K=0.032 M*atm-1
The acid dissociation constants listed in most standard reference texts for carbonic acid actually apply to dissolved CO2. For a CO2 partial pressure of 3.1×10-4 atm in the atmosphere, what is the pH of water in equilibrium with the atmosphere?
Given data,
PCO2 = 3.14 x 10-4 atm
Concentration of CO2 = Kco2 x Pco2
= 0.032 x 3.1 x 10^-4
= 9.92 x 10^-6 M
Ka = [H+]^2 / [CO2(aq)]
4.46 x 10^-7 = [H+]^2 / 9.92 x 10^-6
[H+]^2 = 4.46 x 10^-7 x 9.92 x 10^-6
= 4.42 x 10-10
[H+] = 2.10 x 10-5 M
pH = -log[H+]
= -log ( 2.10 x 10-5)
= 4.67
Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2...
Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2 satisfies the equilibrium equation. CO2 (g) <--> CO2 (aq) K= 0.032 M atm-1 The acid dissociation constants listed in most standard reference texts for carbonic acid actually apply to dissolved CO2. For a CO2 partial pressure of 8.8×10-4 atm in the atmosphere, what is the pH of water in equilibrium with the atmosphere?
Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO2. Dissolved CO2 satisfies the equilibrium equation The acid dissociation constants listed in most standard reference texts for carbonic acid actually apply to dissolved CO2. For a CO2 partial pressure of 1.8×10–4 bar in the atmosphere, what is the pH of water in equilibrium with the atmosphere? (For carbonic acid Ka1 = 4.46× 10–7 and Ka2 = 4.69× 10–11). Carbon dioxide dissolves in water to form carbonic...
Carbon dioxide dissolves in water to form carbonic acid, which is primarily dissolved CO_2. Dissolved CO_2 satisfies the equilibrium equation CO_2(g) CO_2(aq) K=0.032 M atm^-1 The acid dissociation constants listed in most standard reference texts for carbonic acid actually apply to dissolved CO_2. For a CO_2 partial pressure of 7.1x10^-4 atm in the atmosphere, what is the pH of water in equilibrium with the atmosphere?
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