as milk spoils how does the ph change

[onnascience]

when 2 % milk starts to spoil does it become more acidic
what makes milk an acid

[deleted-71417]

Hi,

The acid in spoiled milk is lactic acid. Here is a wikipedia reference:

http://en.wikipedia.org/wiki/Lactic_acid

And another confirmatory link describing the spoilage process:

http://www.madsci.org/posts/archives/20 ... .Gb.r.html

You may also be interested in this biography of Louis Pasteur, who did some of the early research on the souring of milk:

http://drinc.ucdavis.edu/Pasteur.htm

Best regards,


Barrett L Tomlinson