Saturday
August 30, 2014

Homework Help: Chemistry

Posted by Jack on Thursday, March 28, 2013 at 12:28pm.

1.
Which of the following metals is oxidized by calcium ions?

*potassium
zinc
iron
lead






2.
The first electrochemical cell was invented by ____.

Michael Faraday
*Alessandro Volta
James Maxwell
Benjamin Franklin






3.
Why can't a lead storage battery be recharged indefinitely?

A direct current must pass through the cells.
The electrodes lose lead sulfate.
*It is difficult to reverse the direction of current flow.
The electrolyte is too expensive.





4.
Which electrode (anode or cathode) is designated as positive in an electrolytic cell?

anode
*cathode
both
neither






5.
What is the direction of electron flow in an electrolytic cell?


from cathode to anode
*from anode to cathode
in either direction
There is no flow.






6.
What electrolyte can be used to electrolyze water?

hydrochloric acid only
sodium chloride only
sodium hydroxide only
*any electrolyte that is not easily reduced or oxidized






7.
The gas produced at the cathode in the electrolysis of brine is ____.

*hydroxide
chlorines
oxygen
hydrogen






8.
In electroplating, the object to be electroplated is placed _____.

*at the anode
at the cathode
at either the anode or the cathode
in between the anode and the cathode

Thank You.

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