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7. Which of the following species can act both as an acid and a base? a) b) HNO, c) H,SO, d) H,CO, e) HCO

7. Which of the following species can act both as an acid and a base? a) b) HNO, c) H,SO, d) H,CO, e) HCO

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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7. Which of the following species can act both as an acid and a base? a) D b) HNO c) H,SO, d) H,CO, e) HCO, 8. 9. The pK, for the given equilibrium is 7.20. H₂PO HPO,² +H* The pH of a solution prepared by mixing 0.15 moles of H₂PO, and 0.35 moles of HPO² is 6.83 b) 7.57 7.63 d) 9.53 9. Which of the followings is NOT true? a) b) Tissue homogenization refers to breaking a tissue and lysing cells to release cellular contents During centrifugation, the solid that settles to the bottom is called pellet and the remaining solution is called supernatant c) During differential centrifugation, ideally, we want to isolate morphologically intact and functionally active organelles As the size of nuclei is bigger than that of ribosomes, a higher relative centrifugal force is required to sediment nuclei as compared to ribosomes d) 10. In one of the labs, you separated blue dextran (approximate molar mass 2,000,000 g/mol) and sodium salt of fluorescein (molar mass 376.28 g/mol) using size-exclusion chromatography. Based on the knowledge gained from that experiment, which of the following is a TRUE statement? a) Blue dextran molecules are eluted first out of the column first, because these molecules are too big to fit inside the pores and hence they flow through the interparticle space b) Blue dextran molecules are eluted first out of the column, because these molecules pass through the pores of the stationary phase gel particles c) Fluorescein molecules are eluted first out of the column, because these molecules pass through the pores of the stationary phase gel particles d) Fluorescein molecules are eluted first out of the column, because these molecules are too big to fit incide the noree and hence they flow through the
Transcribed Image Text:7. Which of the following species can act both as an acid and a base? a) D b) HNO c) H,SO, d) H,CO, e) HCO, 8. 9. The pK, for the given equilibrium is 7.20. H₂PO HPO,² +H* The pH of a solution prepared by mixing 0.15 moles of H₂PO, and 0.35 moles of HPO² is 6.83 b) 7.57 7.63 d) 9.53 9. Which of the followings is NOT true? a) b) Tissue homogenization refers to breaking a tissue and lysing cells to release cellular contents During centrifugation, the solid that settles to the bottom is called pellet and the remaining solution is called supernatant c) During differential centrifugation, ideally, we want to isolate morphologically intact and functionally active organelles As the size of nuclei is bigger than that of ribosomes, a higher relative centrifugal force is required to sediment nuclei as compared to ribosomes d) 10. In one of the labs, you separated blue dextran (approximate molar mass 2,000,000 g/mol) and sodium salt of fluorescein (molar mass 376.28 g/mol) using size-exclusion chromatography. Based on the knowledge gained from that experiment, which of the following is a TRUE statement? a) Blue dextran molecules are eluted first out of the column first, because these molecules are too big to fit inside the pores and hence they flow through the interparticle space b) Blue dextran molecules are eluted first out of the column, because these molecules pass through the pores of the stationary phase gel particles c) Fluorescein molecules are eluted first out of the column, because these molecules pass through the pores of the stationary phase gel particles d) Fluorescein molecules are eluted first out of the column, because these molecules are too big to fit incide the noree and hence they flow through the
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