CHEM 2770 Midterm: CHEM 2770 277Oct-2004 Exam
31 Jan 2019
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A 20 ml volume of 0. 072 m hcl solution requires 7. 2 ml of a naoh solution for complete titration. What is the concentration of the naoh: threonine b) leucine c) valine d) phenylalanine e) isoleucine. The net charge on the dipeptide aspartyllysine at ph 7 is : -1 c) 0, -2, +1, +2, 0. 072 m b) 0. 144 m c) 0. 1 m, 0. 2 m, 0. 4 m. 20 ml of 0. 072 m hcl solution is added to 80 ml of pure water. What is the ph of the resulting solution: 1. 14, 1. 84, 3. 68, 7. 0, 3. 68. A buffer solution is prepared by mixing 500 ml of 0. 4 m sodium acetate and 500 ml of 0. 2 m acetic acid. What is the ph of the buffer solution prepared? (pka for acetic acid = 4. 76: 5. 46, 5. 06, 4. 76, 4. 46, 4. 06. 100 ml of 0. 5 m hcl is added to the buffer prepared above in question 6.
