Question

Какая масса сульфата кальция может быть получена при взаимодействии 37 г 15% раствора гидроксид кальция с серной кислотой? ПОЖАЛУЙСТА! 70 баллов!

Answer 1

Ответ: Смотри на фото)

Объяснение: Слушай вроде так )

Answer 2

Ответ:

10,2г

Объяснение:

Уравнение: Ca(OH)2 + H2SO4 = CaSO4 + 2H2O
m(Ca(OH)2) = 37 * 0.15 = 5,55 г
n(Ca(OH)2) = 5,55/74 = 0,075 моль
m(CaSO4) = 136 * 0.075 = 10,2г

Answer 3

Calculating the Mass of Calcium Sulfate Produced

To calculate the mass of calcium sulfate produced when 37 g of a 15% solution of calcium hydroxide reacts with sulfuric acid, we can use the stoichiometry of the reaction between calcium hydroxide and sulfuric acid. The balanced chemical equation for the reaction is:

Ca(OH)2 + H2SO4 → CaSO4 + 2H2O

From the balanced equation, we can see that 1 mole of calcium hydroxide reacts with 1 mole of sulfuric acid to produce 1 mole of calcium sulfate.

Step 1: Calculate the Amount of Calcium Hydroxide in the Solution

The 15% solution of calcium hydroxide means that there are 15 g of calcium hydroxide in 100 g of the solution. Therefore, the amount of calcium hydroxide in 37 g of the solution can be calculated as:

Amount of Ca(OH)2 = (15/100) * 37 g

Step 2: Convert the Amount of Calcium Hydroxide to Moles

The molar mass of calcium hydroxide (Ca(OH)2) is 74.093 g/mol. Using this molar mass, we can convert the amount of calcium hydroxide to moles.

Moles of Ca(OH)2 = (Amount of Ca(OH)2) / (Molar mass of Ca(OH)2)

Step 3: Use Stoichiometry to Calculate the Mass of Calcium Sulfate Produced

From the balanced chemical equation, we know that 1 mole of calcium hydroxide produces 1 mole of calcium sulfate. Therefore, the moles of calcium hydroxide calculated in Step 2 will also be the moles of calcium sulfate produced.

Finally, we can convert the moles of calcium sulfate to grams using the molar mass of calcium sulfate (CaSO4), which is 136.14 g/mol.

Mass of CaSO4 produced = (Moles of CaSO4) * (Molar mass of CaSO4)

Let's calculate the mass of calcium sulfate produced using the given information and the steps outlined above.