The total volatile fatty acid (TVFA) concentration of a waste sample is 2700 mg/L as acetic. The total concentration is made up of acetic, propionic, butyric and valeric acids. If the concentration of acetic acid is 980 mg/L (as acetic) propionic is 640 mg/L (as acetic) butyric is 310 mg/L (as acetic) valeric is 770 mg/L (as acetic), explain what is the total concentration of acids as valeric?
Acetic CH3COOH
Propionic CH3CH2COOH
Butyric CH3CH2CH2COOH
Valeric CH3CH2CH2CH2COOH