Question

s 37 secs .00 O out of 100.00 How many mL of a 39% dextrose must you dilute to 121 mL to make a 6% solution? (MlV,-M,V2) Answer: 787 What is the pOH if the pH is 4.8? [H+1-10-pH pOH--log [OH-1 pH-14-pOH Answer: 9.2 Finish review

Answer 1

Suppose the density of solution is 1 gm/mol Given % age of Sucrose = 39% formula of molarity = %age times 10 times density/molecular mass M-1 = 39 times 10 times 1/180 = 2.17 m similarly molarity of 6% sucrose solution M_2 = 6 times 10 times 1/180 = 33, V = 121 mol Now According to molarity equation M_1V_1 = M_2 V_2 V_1 = M_2 V_2/M_1 = 33 times 121/2.17 = 18.40 ml P^H + POH = 14 POH = 14 - 4.8 = 9.2