Question

Сколько литров лучила серы (4) образуется при разложении 50 г сульфита калия, содержащего 15% примесей

Answer 1

Считая, что некое "лучило" серы (4) - это SO2:
K2SO3-->K2O+SO2; хотя должен заметить, что сульфиты так не разлагаются.
n(SO2)=m(K2SO3)/M(K2SO3)=50г*0,85/158г/моль=0,27 моль
V(SO2)=n(SO2)*Vm=0,27моль*22,4дм^3/моль=6,048 дм^3

Answer 2

Calculation of Sulfur Produced

To calculate the amount of sulfur produced when 50 grams of potassium sulfite (containing 15% impurities) decomposes, we need to determine the amount of pure potassium sulfite and then calculate the amount of sulfur produced.

1. Calculate the amount of pure potassium sulfite: - The potassium sulfite contains 15% impurities, which means that 85% of it is pure. - Therefore, the amount of pure potassium sulfite is 50 grams multiplied by 0.85 (85%): 50 grams * 0.85 = 42.5 grams.

2. Calculate the amount of sulfur produced: - The chemical formula for potassium sulfite is K2SO3, which means that for every 1 mole of potassium sulfite, 1 mole of sulfur is produced. - The molar mass of potassium sulfite (K2SO3) is: - 2 moles of potassium (K) with a molar mass of 39.1 grams/mole = 78.2 grams/mole. - 1 mole of sulfur (S) with a molar mass of 32.1 grams/mole = 32.1 grams/mole. - 3 moles of oxygen (O) with a molar mass of 16.0 grams/mole = 48.0 grams/mole. - Therefore, the molar mass of potassium sulfite is: 78.2 grams/mole + 32.1 grams/mole + 48.0 grams/mole = 158.3 grams/mole.

- To calculate the amount of sulfur produced, we need to convert the mass of pure potassium sulfite to moles using its molar mass: 42.5 grams / 158.3 grams/mole = 0.268 moles.

- Since the molar ratio between potassium sulfite and sulfur is 1:1, the amount of sulfur produced is also 0.268 moles.

3. Convert moles of sulfur to liters: - The conversion from moles to liters depends on the temperature and pressure conditions. Without this information, it is not possible to provide an accurate conversion.

Therefore, based on the given information, we can determine that 0.268 moles of sulfur are produced when 50 grams of potassium sulfite, containing 15% impurities, decomposes. However, without the temperature and pressure conditions, we cannot provide the conversion to liters.