Lesson: Volumetric Analysis Chemistry

In this lesson, we will learn how to describe volumetric analysis and use results from titration experiments to calculate the concentration of a solution.

Lesson Plan

Students will be able to

describe volumetric analysis and its uses,
recall how to calculate the number of moles from concentration and volume,
recall how to use balanced equations and ratios to calculate the number of moles of one reactant from the volume of another reactant,
calculate the concentration of an acid from the volume of base that neutralizes it and vice versa,
use the results from a titration experiment to calculate the unknown concentration of a solution,
calculate the percentage of an acid or base in a mixture.

Lesson Video

Lesson Explainer

Lesson Playlist

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06:11
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04:44

Lesson Worksheet

Q1:

A titration experiment was performed to determine the concentration of sulfuric acid using a known concentration of potassium hydroxide. 100 mL of sulfuric acid was placed in a conical flask and a few drops of phenolphthalein indicator were added. A 0.6 M solution of potassium hydroxide was then slowly added into the conical flask. The amount of potassium hydroxide added and any observations were recorded.

At what volume was the end point of the reaction reached?

What was the concentration of the sulfuric acid? Give your answer to 3 decimal places.

Q2:

A 30 mL solution of nitric acid was titrated against a 0.1 M solution of potassium hydroxide. The addition of 26.6 mL of potassium hydroxide was found to neutralize the nitric acid. What is the concentration of the nitric acid? Give your answer to 2 decimal places.

Q3:

The concentration of a sample of milk of magnesia, , was determined by titration with phosphoric acid . 30 mL of milk of magnesia required 54.8 mL of 0.5 M phosphoric acid to neutralize it. The equation for this reaction is shown:

What was the concentration of the milk of magnesia?