When carbon dioxide is bubbled through water, the solution becomes acidic. There are two possible ways to view this phen

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When Carbon Dioxide Is Bubbled Through Water The Solution Becomes Acidic There Are Two Possible Ways To View This Phen 1 (34.79 KiB) Viewed 34 times

When carbon dioxide is bubbled through water, the solution becomes acidic. There are two possible ways to view this phenomenon. One perspective is to hypothesise that when carbon dioxide is dissolved in water, it forms carbonic acid (H2​CO3​). The carbonic acid is then viewod as the acid in solution: H2​CO3(aq)​⇌H(aq)+​+HCO2(aq)−​Ka1​=2.6×10−4 Another perspective is to view carbon dioxide (CO2​ ) itself as the acid, like in the equation below: CO2(aq)​+H2​O(b)​⇌H(a+​)+HCO3(aq)−​Ka2​=4.42×10−7 QUESTIONS: 1. Explain why CO2​ can be considered to be an acid in the second equilibrium shown above. [1 mark] 2. Compare the two equilibria given. Which is the strongest acid? CO2​ or H2​CO3​ ? Justify your answer. [2 mark] 3. Using the second equilibrium given, predict the pH value if 1 mol of CO2​ is initially dissolved in 2 L of water. [4 mark: