Question

Негашеную известь CaO получают обжигом известняка CaCO3 в специальных печах. Какую массу негашеной извести можно получить при обжиге 200 кг известняка, содержащего 20% примесей? Массовая доля выхода негашеной извести составляет 90%.

Answer 1

Удачной учёбы и всего Вам светлого!

Answer 2

Calculation of the Mass of Unslaked Lime (CaO)

To calculate the mass of unslaked lime (CaO) that can be obtained from the calcination of 200 kg of limestone (CaCO3) containing 20% impurities, we need to consider the following information:

- Mass of limestone (CaCO3): 200 kg - Impurity content: 20% - Yield of unslaked lime (CaO): 90%

To find the mass of unslaked lime, we need to calculate the mass of pure limestone and then determine the mass of unslaked lime obtained from it.

1. Calculate the mass of pure limestone: - Mass of limestone = 200 kg - Impurity content = 20% - Mass of impurities = 20% of 200 kg = 0.2 * 200 kg = 40 kg - Mass of pure limestone = Mass of limestone - Mass of impurities = 200 kg - 40 kg = 160 kg

2. Calculate the mass of unslaked lime: - Yield of unslaked lime = 90% - Mass of unslaked lime = Yield of unslaked lime * Mass of pure limestone = 90% * 160 kg = 0.9 * 160 kg = 144 kg

Therefore, the mass of unslaked lime that can be obtained from the calcination of 200 kg of limestone containing 20% impurities is 144 kg.

Please note that the calculations are based on the given information and assumptions.