Neutralization calculations

In summary, a student obtained a 25.00 mL HCl solution of unknown concentration and titrated it with 21.35 mL of 0.1200 M NaOH to determine the concentration of the HCl solution. The capital M represents the concentration in mol/litre. The equation used was NaOH + HCl = NaCl + H2O. The number of mols will be the same for every substance.
  • #1
Aya
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A student obtains 25.00 mL of an HCl solution of unknown concentration. Upon titration, 21.35 mL of 0.1200 M NaOH are required for neutralization. Determine the concentration of the HCl solution.

the capital M is molar mass right? but i thught that was constant so how can it be 0.1200 M NaOH? :confused: or do they mean m for mols :confused:

so the first thing you need to do is write the equation

NaOH + HCL = NaCl + H2O

using the mol ration, the number of mols will be the same for every thing elce
soo... now what?
 
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  • #2
M stands for the concentration of the solution. It is equivalent to [tex]moldm^{-3}[/tex] or [tex]mol/litre[/tex].
 
  • #3


Now, you can use the mole ratio and the volume of NaOH used to calculate the number of moles of HCl that were neutralized. This can be done using the formula:

n = M x V

Where n is the number of moles, M is the molarity, and V is the volume in liters.

Using the values given in the problem, we can calculate the number of moles of NaOH used in the titration:

n = 0.1200 mol/L x 0.02135 L = 0.002562 mol NaOH

Since the mole ratio between NaOH and HCl is 1:1, this means that the same number of moles of HCl were neutralized.

Now, we can use this value to calculate the concentration of the HCl solution:

n = M x V
0.002562 mol HCl = M x 0.02500 L
M = 0.002562 mol HCl / 0.02500 L = 0.10248 mol/L

Therefore, the concentration of the HCl solution is 0.10248 mol/L.

Note: The capital M in this context stands for molarity, which is the unit for concentration. It is not related to the molar mass.
 

What is neutralization calculation?

Neutralization calculation is a mathematical process used to determine the amount of acid or base needed to reach neutral pH in a chemical reaction. It involves using the known concentrations and volumes of the acid and base to calculate the amount of each that will react together to form a neutral solution.

What is the purpose of neutralization calculation?

The purpose of neutralization calculation is to accurately determine the amount of acid or base needed to neutralize a solution. This is important in a variety of scientific fields, including chemistry, biology, and environmental science, as it allows for precise control of reactions and the creation of neutral solutions for experiments or practical applications.

How do you perform neutralization calculations?

To perform neutralization calculations, you first need to know the concentrations and volumes of the acid and base involved in the reaction. Then, you can use the formula M1V1 = M2V2, where M1 is the initial concentration, V1 is the initial volume, M2 is the final concentration, and V2 is the final volume. Plug in the values and solve for the unknown variable to determine the amount of acid or base needed for neutralization.

What are some factors that can affect neutralization calculations?

Some factors that can affect neutralization calculations include the strength of the acid and base, temperature, and the presence of other substances in the solution. Stronger acids and bases will require less volume to reach neutral pH compared to weaker ones. Temperature can also affect the reaction rate and therefore the amount of acid or base needed. Other substances in the solution can also react with the acid or base and change the overall neutralization process.

What are some real-world applications of neutralization calculations?

Neutralization calculations have many real-world applications, such as in water treatment plants to neutralize acidic or basic water, in the production of pharmaceuticals to create neutral solutions for medications, and in agriculture to determine the amount of acid or base needed for soil pH correction. They are also used in various laboratory experiments and in industries such as food and beverage production to ensure the correct pH levels for product safety and quality.

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