Question

Как правильно написать дано?решение не обязательно Задача: Для нейтрализации раствора, содержащего 0,2055г Na2CO3, израсходовано 40,00 мл Н2SO4. Определить нормальность и титр раствора серной кислоты.

Answer 1

Дано: 
m(Na2CO3) = 0.2055г
v(H2SO4) = 40 мл

Answer 2

Problem Analysis

The problem states that 0.2055g of Na2CO3 (sodium carbonate) was neutralized by 40.00 mL of H2SO4 (sulfuric acid). We need to determine the normality and titer of the sulfuric acid solution.

Definitions

Before we proceed with the solution, let's define the terms "normality" and "titer": - Normality: Normality is a measure of the concentration of a solution. It is defined as the number of gram equivalents of solute per liter of solution. The gram equivalent weight is the molar mass of the solute divided by the number of equivalents. - Titer: Titer is a measure of the concentration of a solution. It represents the number of moles of a substance in a given volume of solution.

Solution

To find the normality and titer of the sulfuric acid solution, we need to use the given information and apply the appropriate formulas.

1. Calculate the number of moles of Na2CO3: - The molar mass of Na2CO3 is 105.99 g/mol. - The number of moles of Na2CO3 can be calculated using the formula: moles = mass / molar mass. - Substituting the values, we get: moles of Na2CO3 = 0.2055 g / 105.99 g/mol.

2. Determine the number of moles of H2SO4: - The balanced chemical equation for the reaction between Na2CO3 and H2SO4 is: 2 Na2CO3 + H2SO4 → Na2SO4 + 2 H2O + CO2. - From the equation, we can see that 1 mole of H2SO4 reacts with 2 moles of Na2CO3. - Therefore, the number of moles of H2SO4 is half the number of moles of Na2CO3.

3. Calculate the normality of the sulfuric acid solution: - The normality is given by the formula: normality = (moles of solute / volume of solution in liters) * 1000. - Substituting the values, we get: normality = (moles of H2SO4 / 0.040 L) * 1000.

4. Calculate the titer of the sulfuric acid solution: - The titer is given by the formula: titer = (moles of solute / volume of solution in liters). - Substituting the values, we get: titer = moles of H2SO4 / 0.040 L.

Calculation

Let's calculate the normality and titer of the sulfuric acid solution using the given information.

1. Calculate the number of moles of Na2CO3: - The molar mass of Na2CO3 is 105.99 g/mol. - The number of moles of Na2CO3 = 0.2055 g / 105.99 g/mol.

2. Determine the number of moles of H2SO4: - The number of moles of H2SO4 = (moles of Na2CO3) / 2.

3. Calculate the normality of the sulfuric acid solution: - The normality = (moles of H2SO4 / 0.040 L) * 1000.

4. Calculate the titer of the sulfuric acid solution: - The titer = moles of H2SO4 / 0.040 L.

Answer

Based on the calculations, we can determine the normality and titer of the sulfuric acid solution. However, since we don't have the exact value for the moles of Na2CO3, we cannot provide the final numerical values for the normality and titer. To obtain the exact values, you need to substitute the calculated moles of Na2CO3 into the formulas mentioned above.

Please let me know if you need any further assistance.