Dinitrophenol (dnp) is a highly toxic membrane uncoupler. what happens when dnp makes the phospholipid bilayer of inner mitochondrial membranes permeable to protons (h+)?

Imagine that twenty i.u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?