Question

№3. Определите, какая масса мели вступит в реакцию с концентрированной серной кислотой для получения оксида серы (IV) объёмом 3 л (н.у.), если выход оксида серы (IV) составляет 90%

Answer 1

Находим теорит обьем SO2
V(SO2)=3*100 % / 90%=3.33 L
по уравнению реакции находим массу меди
Xg                                        3.33
Сu+2H2SO4(k)-->CuSO4+SO2+2H2O M(Cu)=64g/mol
64                                       22.4
X/64 = 3.33/22.4
X=9.5 g
ответ 9.5 г

Answer 2

Calculating the Mass of Melting Reacting with Concentrated Sulfuric Acid

To calculate the mass of the metal that will react with concentrated sulfuric acid to produce sulfur dioxide, we can use the stoichiometry of the reaction and the given information about the volume and yield of sulfur dioxide.

The balanced chemical equation for the reaction between a metal and concentrated sulfuric acid to produce sulfur dioxide is:

M(s) + H2SO4(l) → MSO4(aq) + SO2(g) + H2O(l)

Given: - Volume of sulfur dioxide (SO2) = 3 L - Yield of sulfur dioxide (SO2) = 90%

We need to find the mass of the metal (M) that will react with the sulfuric acid.

Solution:

1. Calculate the Molar Volume of Sulfur Dioxide: - The molar volume of any gas at standard temperature and pressure (STP) is 22.4 L/mol. - Given volume of sulfur dioxide (SO2) = 3 L - Using the molar volume, we can calculate the number of moles of sulfur dioxide produced.

2. Calculate the Moles of Sulfur Dioxide Produced: - Moles of SO2 = Volume of SO2 / Molar Volume of SO2 - Moles of SO2 = 3 L / 22.4 L/mol

3. Calculate the Moles of Metal Reacting: - From the balanced chemical equation, 1 mole of metal reacts with 1 mole of sulfur dioxide. - Therefore, the moles of metal reacting will be equal to the moles of sulfur dioxide produced.

4. Calculate the Mass of the Metal: - Using the molar mass of the metal, we can calculate the mass of the metal that will react with the sulfuric acid.

5. Final Calculation: - The mass of the metal that will react with the concentrated sulfuric acid can be calculated using the moles of metal and the molar mass of the metal.

Conclusion:

By following the steps outlined above, you can calculate the mass of the metal that will react with concentrated sulfuric acid to produce sulfur dioxide.