Question

Какая соль образуется и чему равна ее масса , если через 100 мл 32%-ного раствора гидроксида калия ( плотность 1,32 г/мл ) пропустили 5,6 л оксида углерода (IV) (н.у.) ?

Answer 1

Ca(OH)2+CO2=CaCO3+H2O
m(раствора)=100мл*1,32г/мл=132г
m(Ca(OH)2)=m(раствора)*W/100%=132г*32%/100%=42,24г
кол-во вещ-ва(Ca(OH)2)=42,24/74=0,6 моль
кол-во вещ-ва(CO2)=5,6/22,4=0,25 моль
кол-во вещ-ва(Ca(OH)2) находится в избытке, а кол-во вещ-ва(CO2) в недостатке.
расчет ведем по недостатку(CO2):
кол-во вещ-ва(CaCO3)=кол-во вещ-ва(CO2)=0,25 моль
m(CaCO3)=0,25*100=25 г
Ответ:CaCO3-средняя соль, m(CaCO3)=25 г

Answer 2

Calculating the Mass of the Resulting Salt

To calculate the mass of the salt formed when 5.6 L of carbon dioxide (IV) is passed through 100 ml of a 32% potassium hydroxide solution, we can use the following steps:

1. Calculate the moles of potassium hydroxide (KOH) in the solution: - The molarity of the 32% KOH solution can be calculated using the density and the percentage concentration. - Then, the moles of KOH can be calculated using the molarity and the volume of the solution.

2. Determine the reaction between carbon dioxide (IV) and potassium hydroxide: - The balanced chemical equation for the reaction between carbon dioxide (IV) and potassium hydroxide can be used to determine the stoichiometry of the reaction.

3. Calculate the moles of the resulting salt: - Using the stoichiometry of the reaction, the moles of the resulting salt can be determined.

4. Convert moles to mass: - Finally, the moles of the resulting salt can be converted to mass using the molar mass of the salt.

Let's proceed with these calculations step by step.

Step 1: Calculate the Moles of Potassium Hydroxide (KOH)

The molarity of the 32% KOH solution can be calculated using the density and the percentage concentration. Then, the moles of KOH can be calculated using the molarity and the volume of the solution.

Step 2: Determine the Reaction Between Carbon Dioxide (IV) and Potassium Hydroxide

The balanced chemical equation for the reaction between carbon dioxide (IV) and potassium hydroxide can be used to determine the stoichiometry of the reaction.

Step 3: Calculate the Moles of the Resulting Salt

Using the stoichiometry of the reaction, the moles of the resulting salt can be determined.

Step 4: Convert Moles to Mass

Finally, the moles of the resulting salt can be converted to mass using the molar mass of the salt.

Let's proceed with the calculations based on the information provided in the question.