Thursday
April 24, 2014

Homework Help: chemestry please check my anwers.

Posted by asap on Wednesday, April 3, 2013 at 5:27pm.

1.How do acid-base reactions differ from oxidation-reduction (or "redox") reactions?
Answer

Acid-base reactions involve an exchange of protons whereas redox reactions involve an exchange of electrons.<<<

Acid-base reactions and redox reactions involve different processes and have nothing in common.


2.Why does a battery that has thick zinc walls last longer than one that has thin zinc walls?
Answer

Thick zinc walls prevent the battery from over heating.

The zinc walls are transformed into zinc ions as the battery provides electricity<<<<


3.Why are combustion reactions generally exothermic?
Answer

Hydrogen easily pulls electrons from the oxygen in water molecules and are reduced.


Combustion involves the transfer of electrons to oxygen, which has an extremely high tendency for gaining electrons.<<<?? maybe

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