How much carbon dioxide will be released during the decomposition of 400 g of potassium carbonate?
| June 20, 2021 | education
1. Let’s write down the reaction equation:
K2CO3 = K2O + CO2.
2. Find the amount of potassium carbonate:
n (K2CO3) = m (K2CO3) / M (K2CO3) = 400 g / 138 g / mol = 2.9 mol.
3. According to the reaction equation, we find the amount of carbon dioxide, and then its volume (Vm – molar volume, constant equal to 22.4 l / mol):
n (CO2) = n (K2CO3) = 2.9 mol.
V (CO2) = n (CO2) * Vm = 2.9 mol * 22.4 l / mol = 64.93 l.
Answer: V (CO2) = 64.93 liters.
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