Question

C. BONUS: You are preparing 1 L of 0.15M lactic acid and adjusting the pH to 3. volume of NaOH must be added to achieve a pH of 4.5?

Answer 1

means in a solution of pH 3.5 we need to add 28.46 mL of NaOH of 0.01M to have a pH of 4.5

Answer At the begining, the amount of substance. of Hydronium in nEngor - 10-3-5 x 1 = 10-3 mal Altor adding NaOH, Hoot amount is. (Ho) + = 10 4 - 5x1 = 10 -4.5 mal Difference of Amount = hydronium ion rearted with OH ions An(H₂O) = Cormanos - n(OH) 10-3-5 - 10-4.5 Volume of NaOH needed a mole - molarity po 10-3-5-10-4.5 0.01 = 0.0002 846 0.01 - 0.02846 L - 28.46 mL of NaOH added.