# Calculate the concentration (in molarity) of a NaOH solution if 250 mL of the solution is needed...

## Question:

Calculate the concentration (in molarity) of a NaOH solution if 250 mL of the solution is needed to neutralize 71.4 mL of a 0.312 M HCl solution.

## Neutralization Reaction:

A Bronsted-Lowry acid (proton donor) will react with a Bronsted-Lowry base (proton acceptor) in aqueous solution to create two conjugate products. If both reactants are monoprotic, then they will react in a 1:1 stoichiometric ratio, which is present on the left side of the balanced chemical equation. In this example, the 1:1 ratio corresponds to a reactant molar ratio required for complete neutralization to occur. When the reactants are mixed this way there is no limiting reactant. If we know the starting moles of one reactant and this ratio, then we can find the required starting moles of the other reactant. The reaction here will proceed to completion and the pH will actually be neutral (7) if both reactants are relatively strong.

## Answer and Explanation: 1

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View this answerSodium hydroxide (NaOH) is a strong monoprotic base. Hydrochloric acid (HCl) is a strong monoprotic acid. The balanced reaction equation is:

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Chapter 12 / Lesson 11Learn about equivalence point and end point in titrations. Examine how to find equivalence points in a variety of ways, and discover the steps to do so.

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