Determine the minimum mass of sodium hydroxide required to completely absorb 33.6 liters of carbon dioxide under normal conditions.
V (CO2) = 33.6 l
m (NaOH) -?
1) 2NaOH + CO2 => Na2CO3 + H2O;
2) n (CO2) = V (CO2) / Vm = 33.6 / 22.4 = 1.5 mol;
3) n (NaOH) = n (CO2) * 2 = 1.5 * 2 = 3 mol;
4) m (NaOH) = n (NaOH) * M (NaOH) = 3 * 40 = 120 g.
Answer: The mass of NaOH is 120 g.
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