Using the Henderson-Hasslebach equation, pH=pKa+log([base]/[acid]), we can determine the pH as follows:
pH=4.4+log([0.8]/[0.2])
pH=4.4+log(4)
pH=4.4+0.60
pH=5.0
Yoghurt mixtures are incubated to ensure multiplication of lactic acid bacteria. This means that lactic acid will be produced, which will give the product good flavour and texture and extend shelf life.
Rubber serves a vital role in transportation industries but is also an important production material for medical supplies, packaging and sealing devices, construction equipment, and other goods.
There is really no specific range of lactic acid in an athlete.