1. What were the concentrations of samples A and B?

2. What are some possible sources of error in a titration experiment? Share some tips to minimize errors with your classmates.

3. What is an example of a problem that can be solved using titration in the real world?

4. Phenolphthalein was used as the indicator in the experiment. The universal indicator exhibits the rainbow of colors for the entire pH range. Do you think using the universal indicateor would also work for this lab? Justify your answer, and explain why you agree or disagree.

A process of determining the concentration of a dissolved substance in terms of the smallest amount of reagent of known concentration required to bring about a given effect in reaction with a known volume of the test solution

The general source of error in titration has been;

The measurement of volume in burette by at the lower meniscus. It has been corrected with the application of measurement at eye level.

The air bubble in the burette results in the incorrect measurement of the volume of burette. It can be corrected by tapping the burette or by slowing adding the solution to remove the bubble.

The absence of rinsing the burette before use has been resulted in the water droplets that has been results in the incorrect measurement and dilution of the solution. The correction has been made by the use of dried burette.

A food processing company might use titration to calculate the precise amount of salt in a particular food stuff.

It can also be used to determine the concentration of vitamin C or vitamin E additives in foods.

Universal indicator can also work as the indicator in the lab.

When universal indicator is added to a solution, the color change can indicate the approximate pH of the solution.

Acids cause universal indicator solution to change from green toward red whereas, bases cause universal indicator to change from green toward purple.

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