Question

Titration of a Weak Base Prelaboratory Questions 1. Will addition of HCl to a solution make it more acidic or more basic? Will the pH increase or decrease? How does an end point differ from an equivalence point? 2. were titrated with a standard HCl solution: 3. Aliquots of an unknown tris sample Use the balanced equation to set up the string calculation showing how the tris a. mol of acid, L of acid. mo of base, and L of concentration will be calculated. Use L base to represent the reactants. Remember the calculation must include a stoichiometric ratio. b. A 20.00 mL aliquot of tris was titrated with 0.1009 M HCI. The sample required 20.67 mL HCI to reach a BCG endpoint. What is the molarity of the tris solution? 63

Answer 1

called The spaces which produces Htions in solution are as acids. 401 produces ut ions, therefox it is neid. Hican Hage & Cicago Therefore, it Her is added in solution, it makes more acidic. Ans - mose acidic). AS Increase in utions in solution, decreases ph. (acidity increases – ph decreases) se ph decreases) Endpoint: - Antitration, we w use the indicates to indicate the completion & tisation. When indicator change its colour, then it is called ces end point. eg. Phenolphthalense changes from coloustess to to pick as pink to coloustess e Equivalence point:- The point at which the amount (moler. & titant is equal to amount (moles) to titrend. (solution of knows concentration. trinant, son of unknown conch – tripand) This point is called as equivalence point.