Why does aqueous solution of copper sulphate has pH less than 7? Share with your friends Share 0 Swathi Thomas answered this becuz CuSO4 is an acid & an acid as a pH LEvel less than 7 -1 View Full Answer Geet The Unseen answered this CuSO4 has pH less than 7 bcz it is made frm a strong acid and a weak base ......... and its obvious that if there is a strong acid then there must be acidic nature .........no thmb down .... ;) 6 Enrique Iglesias answered this hey thnq... -1 Geet The Unseen answered this its my pleasure ... :) -1 Enrique Iglesias answered this :) 1