Saturday
April 25, 2015

Homework Help: chemistry

Posted by key on Sunday, January 21, 2007 at 8:52am.

Need Help Finishing:

Purpose:
To observe a chemical reaction.

Materials:
Vinegar (acetic acid, CH3COOH)
Baking soda (NaHCO3)
Measuring cups and spoons
Cup

Procedure:
1. Place cup of vinegar in the cup.
2. Add 1 tablespoon on baking soda.
3. Record your observations.
(Observed a bubbling with a rising of the liquid which
was carbon dioxide escaping)

Questions:
1. Write the balanced equation for the first step in the reaction between vinegar and baking soda, with carbonic acid (H2CO3) as a product. What type of reaction is this?
( HC2H3O2 + NaHCO3--->NaC2H3O2 + H2CO3 ,
which is double replacemtent...is this correct?

Need Help with the rest.......


2. Write the balanced equation for the second step in the reaction, the liberation of carbon dioxide from carbonic acid. What type of reaction is this?
3. Write the combined, balanced equation for the complete chemical reaction between vinegar and baking soda.




Rule: Acids react with carbonates to yeild a salt, carbon dioxide, and sometimes water.

In your supposed synopisis, where carbonic acid is formed, it decomposes to water and carbond dioxide.

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