Carbon dioxide dissolves in water to form carbonic acid, which is primarily diss
ID: 1002523 • Letter: C
Question
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).
Map Sapling Learning macmilan learning 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 The acid dissociation constants listed in most standard reference texts for carbonic acid actually apply to dissolved CO2. For a CO2 partial pressure of 1.8x10 bar in the atmosphere, what is the pH of water in equilibrium with the atmosphere? (For carbonic acid Ka,-4.46 x 10-7 and Ka2 = 4.69x10-11). Number 5.51Explanation / Answer
[H+] = sqrt(Ka*C)
= sqrt(4.46*10^-7*1.8*10^-4)
= 8.96*10^-6
pH = -log(8.96*10^-6)
= 5.05