Example Of A Reactions That Forms Carbonic Acid, Then Gas: The "Baking Soda Volcano" (Page 4 of 5) in pdf

Example Of A Reactions That Forms Carbonic Acid, Then Gas: The "Baking Soda Volcano" Page 4

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SINGLE REPLACEMENT REACTIONS

One element, usually a metal, replaces another element in

a compound. This forms a new compound and leaves behind

a new free element!

example:

Silver gains electrons, goes

Copper loses electrons, goes

from +1 charge to 0 charge!

from 0 charge to +2 charge!

... but just because you combine an element and a compound doesn't mean that a reaction will

occur. Some combinations react, some don't!

- Whether a reaction occurs depends on how easily the replacing and replaced elements lose

electrons. An atom that loses electrons more easily will end up in IONIC form (in other words,

in the compound). An atom that loses electrons less easily will end up as a free element.

- We say that an atom that loses elecrons more easily that another is MORE ACTIVE than the

other element. But how would you get information about ACTIVITY?

A single replacement reaction is an example of a reaction where ELECTRON TRANSFER

is a driving force. Electron transfer reactions are generally called OXIDATION-REDUCTION

reactions.

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