Bill Nye Labs on Chemistry DVD - 15 minutes
Chemistry Experiment Lab - 50 minutes
- Tools of the Lab
- Experiment 1 with Water
- Experiment 2 with Vinegar
- Reflection on what transpired
Vinegar is composed of about 5% acetic acid. This is the major chemical component of vinegar.
The systematic or proper chemical name of acetic acid is ethanoic acid.
Vinegar is a weak acid produced by the oxidation of alcohol (ethanol) from wines and ciders by bacteria. It has a pleasant sour taste and is used in cooking or as a condiment. It is commercially sold as white vinegar, brown vinegar, cider vinegar and balsamic vinegar.
The complete structural formula of acetic acid is as follows.
The condensed structural formula for acetic acid (the main component in vinegar) is CH3COOH.This formula is a shorthand way of representing the complete structural formula (see above picture).The first carbon atom is surrounded by three hydrogen atoms. The second carbon atom is surrounded by one oxygen atom and a OH group. Hence it's formula is CH3COOHThe molecular mass or molar mass of acetic acid is 60.05 g/mol
The Experiment today:
Question: What do vinegar and baking soda mixed together yield? What is the balanced equation of this reaction?
Replies: Vinegar is acetic acid: CH3COOH
Baking soda is sodium bicarbonate: NaHCO3
Mixing the two is simply and acid base reaction.
CH3COOH + NaHCO3 ---> CH3COONa + H2CO3
That last product is carbonic acid which quickly decomposes into carbon dioxide and water:
H2CO3 ---> H2O + CO2
The CO2 is what you see foaming and bubbling in this reaction.
x
- Tools of the Lab
- Experiment 1 with Water
- Experiment 2 with Vinegar
- Reflection on what transpired
Vinegar is composed of about 5% acetic acid. This is the major chemical component of vinegar.
The systematic or proper chemical name of acetic acid is ethanoic acid.
Vinegar is a weak acid produced by the oxidation of alcohol (ethanol) from wines and ciders by bacteria. It has a pleasant sour taste and is used in cooking or as a condiment. It is commercially sold as white vinegar, brown vinegar, cider vinegar and balsamic vinegar.
The complete structural formula of acetic acid is as follows.
The condensed structural formula for acetic acid (the main component in vinegar) is CH3COOH.This formula is a shorthand way of representing the complete structural formula (see above picture).The first carbon atom is surrounded by three hydrogen atoms. The second carbon atom is surrounded by one oxygen atom and a OH group. Hence it's formula is CH3COOHThe molecular mass or molar mass of acetic acid is 60.05 g/mol
The Experiment today:
Question: What do vinegar and baking soda mixed together yield? What is the balanced equation of this reaction?
Replies: Vinegar is acetic acid: CH3COOH
Baking soda is sodium bicarbonate: NaHCO3
Mixing the two is simply and acid base reaction.
CH3COOH + NaHCO3 ---> CH3COONa + H2CO3
That last product is carbonic acid which quickly decomposes into carbon dioxide and water:
H2CO3 ---> H2O + CO2
The CO2 is what you see foaming and bubbling in this reaction.
x
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