Question

Помогите пожалуйста!! вычислите массу серной кислоты, которую можно получить из сульфида цинка массой 150 гр

Answer 1

2ZnS+3O2=2ZnO+2SO2
S02+O2=2SO3
SO3+H2O=H2SO4
находим кол-во сульфида цинка 150/97=1,5моль (масса/моляр.масса)
из уравнения реакции видим что кол-во сульфида цинка относится к кол-во серной кислоты как 2/1 значит кол-во серной кислоты равен 1,5/2=0,75
находим массу серной кислоты 0,75*98=73,5г
Ответ 73,5г
вроде бы так решается нас так учили 

Answer 2

Calculating the Mass of Sulfuric Acid from Zinc Sulfide

To calculate the mass of sulfuric acid that can be obtained from 150 grams of zinc sulfide, we can use the following chemical equation:

ZnS + 2HCl → ZnCl2 + H2S

From the balanced chemical equation, we can see that 1 mole of zinc sulfide reacts with 2 moles of hydrochloric acid to produce 1 mole of hydrogen sulfide. Then, the hydrogen sulfide further reacts with oxygen to form sulfur dioxide, which eventually reacts with water to form sulfuric acid.

Using the molar mass of zinc sulfide (ZnS) and sulfuric acid (H2SO4), we can calculate the mass of sulfuric acid produced.

Calculation Steps

1. Calculate the moles of zinc sulfide (ZnS) using its molar mass. 2. Use the mole ratio from the balanced chemical equation to find the moles of sulfuric acid produced. 3. Convert the moles of sulfuric acid to grams using its molar mass.

Calculation

1. Molar mass of ZnS: - Atomic mass of Zn = 65.38 g/mol - Atomic mass of S = 32.07 g/mol - Molar mass of ZnS = 65.38 + 32.07 = 97.45 g/mol

Moles of ZnS = Mass of ZnS / Molar mass of ZnS = 150 g / 97.45 g/mol ≈ 1.54 moles

2. Moles of H2SO4 produced: From the balanced chemical equation, 1 mole of ZnS produces 1 mole of H2S, which further reacts to produce sulfuric acid.

Moles of H2SO4 = Moles of ZnS ≈ 1.54 moles

3. Mass of H2SO4 produced: Molar mass of H2SO4 = 2(1.01) + 32.07 + 4(16.00) = 98.08 g/mol

Mass of H2SO4 = Moles of H2SO4 * Molar mass of H2SO4 ≈ 1.54 moles * 98.08 g/mol ≈ 151 g

The mass of sulfuric acid that can be obtained from 150 grams of zinc sulfide is approximately 151 grams.