|
ข้อคิดเห็นที่
1: http://en.wikipedia.org/wiki/PH pH http://en.wikipedia.org/wiki/Buffer_solution ( Buffer Solution ) pH = pKa + log [ Salt ] / [ Acid ] Acid : H3PO4 Salt : KH2PO4 pKa1 of H3PO4 = 2.15 1 mM = 1 / 1000 M = 0.001 M 1 millimole = 0.001 Mole Molar Weight of KH2PO4 = " b " g 1 millimole of KH2PO4 = " b " mg โดย: นักเคมี [26 พ.ย. 2551 05:56] |