Question

Какая масса 10%го раствора азотной кислоты потребуется для полной нейтрализации 350го 3,7%го раствора гидроксида кальция?

Answer 1

Немножко не влезло, но я дописала на листочке :)

Answer 2

Calculation of the Mass of Nitric Acid Solution Needed for Neutralization

To calculate the mass of a 10% nitric acid solution needed to neutralize 350g of a 3.7% calcium hydroxide solution, we can use the concept of equivalent concentrations and the balanced chemical equation for the neutralization reaction.

Step 1: Write the Balanced Chemical Equation

The neutralization reaction between nitric acid (HNO3) and calcium hydroxide (Ca(OH)2) can be represented by the following balanced chemical equation:

2HNO3 + Ca(OH)2 → Ca(NO3)2 + 2H2O

Step 2: Calculate the Equivalent Concentrations

The equivalent concentration of a solution is the product of its concentration and the number of equivalents of the solute per liter of solution. For nitric acid and calcium hydroxide, the equivalents are equal to the number of moles of the solute.

The equivalent concentration (C_eq) can be calculated using the formula:

C_eq = (Concentration * Normality) / Equivalent weight

Step 3: Calculate the Amount of Substances

Using the balanced chemical equation, we can determine the stoichiometry of the reaction and calculate the amount of substances involved.

Step 4: Calculate the Mass of Nitric Acid Solution Needed

By using the equivalent concentrations and the amount of substances calculated in the previous steps, we can determine the mass of the 10% nitric acid solution needed to neutralize the given amount of calcium hydroxide solution.

I will now proceed with the calculations based on the provided information.