Question

how can the ph of a solution be determined

Answer 1

The pH of an aqueous solution is the measure of how acidic or basic it is. The pH of an aqueous solution can be determined and calculated by using Ph scale

Answer 2

by an ph paper strip
means
dip an ph paper strip in it and match colour to ph scale

or for exact ph
apply formula

ph = -log[H+]

where H+. =. concentration of hydrogen ions