Bibliography

Secondary sources:
 - http://en.wikipedia.org/wiki/Carbonated_water
 - http://en.wikipedia.org/wiki/Formic_acid
 - http://www.ask.com/question/what-is-the-most-common-use-for-formic-acid
 - http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=767
 - http://www.ducksters.com/science/acids_and_bases.php
 - http://en.wikipedia.org/wiki/Acid
 - http://en.wikipedia.org/wiki/Base_%28chemistry%29
 - http://www.rd.com/home/12-problemsolving-uses-for-club-soda/

Primary sources:
 - Exercise book
 - pH scale worksheet