{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Pre-Test1 - BCH 4053 PRE-TEST 1 GROUP NAME This test is...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
BCH 4053 May 19, 2000 PRE-TEST 1 GROUP NAME ____________________ This test is take-home and open book, and it is intended that all members of the group contribute to completing it. Only one copy is to be submitted by the group, and all members who participated should sign their names below. Test is due at the end of class on Friday, May 26. Please use dark pencil or ink and write legibly . ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ Page Points 1 ______ 2 ______ 3 ______ 4 ______ 5 ______ Total ______ Points (15) 1. Draw a titration curve for Histidine on the graph below. Locate and identify the points on the curve corresponding to pK 1 , pK 2 , and pK 3 . Calculate the approximate pI value and locate its position on the curve. Indicate the pH region on the graph in which at least 10% of the histidine side chain is neutral. 13 -- 13 - 12 - 11 - 10 - 9 - 8 - 7 - pH 6 - 5 - 4 - 3 - 2 - 1 - | | | | | | 0.5 1.0 1.5 2.0 2.5 3 equivalents of base °
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon