Baking soda experiment

Solo disponible en BuenasTareas
  • Páginas : 3 (507 palabras )
  • Descarga(s) : 0
  • Publicado : 28 de mayo de 2011
Leer documento completo
Vista previa del texto
To observe the chemical activity of mixing baking soda with vinegar.
Baking soda, empty bottle, vinegar and a balloon.
Place two teaspoonsof baking soda into the empty bottle and add an inch of water. Next place a tablespoon of vinegar into the balloon and cover the top of the bottle with the mounth of the balloon. When the balloon is oncorrectly, lift the end of the balloon releasing the vinager into the bottle.

Describing the Chemical Reaction between Baking Soda and Vinegar

Baking soda, a pure chemical called sodiumbicarbonate, has the chemical formula:

When dissolved in water baking soda separates into sodium (Na+) and bicarbonate ions (HCO3- ):
NaHCO3 ---> Na+(aq) + HCO3-(aq)

Vinegar, a weak (5%)solution of acetic acid in water, partially dissociates into hydrogen ( H+) and acetate ions (CH3COO-):
CH3COOH H+(aq) + CH3COO-(aq)

The reaction between baking soda and vinegar is actually tworeactions, an acid base reaction followed by a decomposition reaction.

When the two ingredients are mixed, hydrogen ions ( H+) from the vinegar react with the bicarbonate ions (HCO3- ) from the bakingsoda to form a new chemical called carbonic acid (H2CO3).
H+ + HCO3- ---> H2CO3

The carbonic acid thus formed then immediately decomposes into carbon dioxide gas (CO2) and water (H2O).
H2CO3 --->H2O + CO2

It's this carbon dioxide gas that you see bubbling and foaming as soon as you mix baking soda and vinegar together.

Using the molecular structures of only the components involved, thechemical reaction can be written:

The overall reaction however, is often written as follows:
NaHCO3 (aq) + CH3COOH (aq) ----> CO2 (g) + H2O (l) + CH3COONa (aq)

What´s going on?

Why does theBubble Bomb explode?
The bubbles in the Bubble Bomb are filled with carbon dioxide, a gas that forms when the vinegar (an acid) reacts with the baking soda (a base).
If you've ever made a cake or...
tracking img