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How could you determine the concentration of a specific molecule, ion or…
How could you determine the concentration of a specific molecule, ion or active ingredient in a household item?
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Limitations
Due to the various points in the experiment requiring measurement of volumes, human error could have a large impact on the reliability of the results
It is impossible to completely remove all contaminants from equipment such as the burette and the pipette, leading to inaccuracies in the results
Temperature fluctuations could easily impact the reaction rate of the experiment thereby leading to a human error when determining at what volume did the solution change colour
The reaction between the acetic acid and the sodium hydroxide may not follow the molar ratio of 1:1, thereby leading to invalid results
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Risk assessment
Some of the compounds used may be hazardous, therefore Personal Protective Equipment is necessary.
Chemical Exposure to acetic acid or sodium hydroxide can both lead to skin and eye irritation upon contact
Some components of the chemicals used, allergic reaction in some participants, therefore it is crucial to identify possible allergens present and take the needed precautions.
Molar concentration
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Concentration can be found using the formula, C = n/v
Titration
A chemical process where a solution with known concentration is used to determine the concentration of a substance with unknown concentration
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Acid-base titration
An acid-base titration is a laboratory technique applied to determine either an acid or a base in the solution. In this case, a known concentration of an acid or base is added gradually, called a titrant, into a solution of unknown concentration of the opposite kind of substance until such time when the reaction between these two substances is complete.