Question

«Расчеты по уравнениям реакций» 8 класс Определите массу оксида кальция, который можно растворить в 109,5 г соляной кислоты, при этом образуется хлорид кальция и вода.​

Answer 1

Ответ:

Відповідь 84 грами CaO потрібно

Объяснение:

на фото, надіюсь зрозумієте)

Answer 2

Calculating the Mass of Calcium Oxide

To calculate the mass of calcium oxide that can be dissolved in 109.5 g of hydrochloric acid, we can use the following chemical equation for the reaction between calcium oxide and hydrochloric acid:

CaO + 2HCl → CaCl2 + H2O

From the balanced chemical equation, we can see that 1 mole of calcium oxide reacts with 2 moles of hydrochloric acid to produce 1 mole of calcium chloride and 1 mole of water.

Steps to Calculate the Mass of Calcium Oxide

1. Determine the Molar Mass of Calcium Oxide (CaO) - The molar mass of calcium oxide (CaO) is 56.08 g/mol [[8 #]].

2. Use the Molar Ratio from the Balanced Equation - From the balanced equation, we know that 1 mole of calcium oxide reacts with 2 moles of hydrochloric acid. - We can use the molar ratio to convert the given mass of hydrochloric acid to moles.

3. Calculate the Mass of Calcium Oxide - Once we have the moles of hydrochloric acid, we can use the molar ratio to determine the moles of calcium oxide required for the reaction. - Finally, we can convert the moles of calcium oxide to grams to find the mass of calcium oxide that can be dissolved in 109.5 g of hydrochloric acid.

Calculation

1. Molar Mass of Calcium Oxide (CaO) - The molar mass of calcium oxide (CaO) is 56.08 g/mol [[8 #]].

2. Molar Ratio - From the balanced equation, 1 mole of calcium oxide reacts with 2 moles of hydrochloric acid.

3. Given Information - Mass of hydrochloric acid (HCl) = 109.5 g

4. Calculating Moles of Hydrochloric Acid - Using the molar mass of hydrochloric acid (HCl), we can calculate the moles of HCl.

5. Using the Molar Ratio - Using the molar ratio from the balanced equation, we can determine the moles of calcium oxide required for the reaction.

6. Calculating the Mass of Calcium Oxide - Finally, we can convert the moles of calcium oxide to grams to find the mass of calcium oxide that can be dissolved in 109.5 g of hydrochloric acid.

Conclusion

The mass of calcium oxide that can be dissolved in 109.5 g of hydrochloric acid can be calculated using the steps outlined above.