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Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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CHEM 1131 Shore Buffer Systems Instructor Lower pH change= pH after add- Approved Initiae DH will getneg answer. DATA PH goes doun. Mass of NaCl needed for 50.0 mL of 0.200 M NaCl solution (Show calculation below.) S0,0 me Ik l6.200 moliyael58.449 I mol Veel 1000 uk will b Posih Initial pH pH after addition of Change in pH from initial pH after addition of Change in pH from initial strong acid strong base 2:43-4.161 177 2.46 - 4.00 -0.0104.74 7.04 4.73 4.42 1.82 4-74 0.08 lei7l 0.04 Water 0.200 M 7,08 NaCl acetate 4.6l6 buffer phosphate buffer le.l02-0.05 QUESTIONS Do chloride or sodium ions have a big effect on pH? What is the evidence that supports your 1. answer? (Hint: Compare the initial pH's of water and 0.200 M NaCl.) *in HalpHof Is the 0.200 M NaCl solution buffered or not? What is the evidence that supports your answer? 2. Compare the pH changes fir the O200M Naclto the Changs obsened for watet and The two bufter Soluticns tow do thepH Changecompare? unbuffered. 73
Transcribed Image Text:CHEM 1131 Shore Buffer Systems Instructor Lower pH change= pH after add- Approved Initiae DH will getneg answer. DATA PH goes doun. Mass of NaCl needed for 50.0 mL of 0.200 M NaCl solution (Show calculation below.) S0,0 me Ik l6.200 moliyael58.449 I mol Veel 1000 uk will b Posih Initial pH pH after addition of Change in pH from initial pH after addition of Change in pH from initial strong acid strong base 2:43-4.161 177 2.46 - 4.00 -0.0104.74 7.04 4.73 4.42 1.82 4-74 0.08 lei7l 0.04 Water 0.200 M 7,08 NaCl acetate 4.6l6 buffer phosphate buffer le.l02-0.05 QUESTIONS Do chloride or sodium ions have a big effect on pH? What is the evidence that supports your 1. answer? (Hint: Compare the initial pH's of water and 0.200 M NaCl.) *in HalpHof Is the 0.200 M NaCl solution buffered or not? What is the evidence that supports your answer? 2. Compare the pH changes fir the O200M Naclto the Changs obsened for watet and The two bufter Soluticns tow do thepH Changecompare? unbuffered. 73
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