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Chem 1C . Laboratory Manual Spring 2005 Summer 2005 Fall 2005 . Kevin M. Simpson, Ph. Department of Chemistry University of California-Riverside...
"Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. You ill need to refer to the Experimental Procedure, particularly the section on calculations, to answer this question.Solution A:10.0 mL 3.0e-4M bromescol green solution25.0mL 1.60M acetic acid (HAc)10.0mL .200M KCl solutionSolution B: 10.0mL 3.0e-4M bromescol green solution10.0mL of .160M sodiuma cetate solutiona.Calculate moles Ac- in solution Bb. Calculate the molarity of HAc in solution A.c. Calculate the volume of solution A needed when the moles of Ac- equals moles of HAc------------------------------------------------------------K HAc is approximately 2e-5 under your experimental conditions. Use pK HAc = pH + log(N HAc/ N Ac-)a. Calculate pKab. calculate moles HAc in 5mL solution A added to solution Bc.Calculate moles Ac- in solution Bd. Rearrange equation to solve for pH" **all the information is in the document on (Prelab 3)Thankyou so much for helping.
