Oc inmaking and stu dent are working together in lab to make a buffer. doc measures exactly 30.0 ml of 0.0635 m acetic acid solution while stu measures exactly 45.0 ml of 0.0285 m sodium acetate solution. they combine the two solutions to form their buffer. stu and doc explore the propetires of their buffer by answering the next seven questions. first, what is the total volume of the buffer when the two solutions are combined