Question

определить массу серной кислоты необходимую для получения 4,48 литра водорода при взаимодействии с алюминием

Answer 1

Простите за почерк :D

В общем,тут всё просто

решаем через количество вещества 

Answer 2

Calculating the Mass of Sulfuric Acid Required

To determine the mass of sulfuric acid needed to produce 4.48 liters of hydrogen through its reaction with aluminum, we can use the balanced chemical equation for the reaction between sulfuric acid and aluminum:

2 Al(s) + 3 H2SO4(aq) → 3 H2(g) + Al2(SO4)3(aq)

From this equation, we can see that 3 moles of hydrogen gas are produced for every 3 moles of sulfuric acid used. Therefore, we need to calculate the amount of sulfuric acid required to produce the given volume of hydrogen gas.

Calculation

Given: - Volume of hydrogen gas produced (V): 4.48 liters - Molar volume of a gas at standard temperature and pressure (STP): 22.4 liters/mol

Using the relationship between volume, moles, and molarity, we can calculate the moles of hydrogen gas produced:

moles = volume / molar volume moles = 4.48 L / 22.4 L/mol moles = 0.2 moles

Since 3 moles of sulfuric acid are required to produce 3 moles of hydrogen gas, the moles of sulfuric acid needed will also be 0.2 moles.

Molar Mass of Sulfuric Acid

The molar mass of sulfuric acid (H2SO4) can be calculated as the sum of the atomic masses of its constituent elements:

Molar mass of H2SO4 = 2(molar mass of H) + molar mass of S + 4(molar mass of O)

Using the atomic masses: - Molar mass of H = 1 g/mol - Molar mass of S = 32.1 g/mol - Molar mass of O = 16 g/mol

Molar mass of H2SO4 = 2(1) + 32.1 + 4(16) Molar mass of H2SO4 = 2 + 32.1 + 64 Molar mass of H2SO4 = 98.1 g/mol

Calculating the Mass of Sulfuric Acid

Finally, we can calculate the mass of sulfuric acid needed using the moles of sulfuric acid and its molar mass:

mass = moles × molar mass mass = 0.2 moles × 98.1 g/mol mass = 19.62 grams

Therefore, to produce 4.48 liters of hydrogen gas through the reaction of aluminum with sulfuric acid, approximately 19.62 grams of sulfuric acid are required.

I hope this helps! If you have further questions, feel free to ask.