Water, pH and Macromolecules The dissociation constant of H2O at 25° C is 10-14 M 107 M 10-7 M 1014 M 10-14 M 107 M 10-7 M 1014 M ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Which of the following acid/base pairs act as natural buffers in living systems? H2PO4-/HPO42- H2CO3/HCO3- Histidine+/histidine All of these H2PO4-/HPO42- H2CO3/HCO3- Histidine+/histidine All of these ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Buffer solutions tend to maintain a relatively constant pH. are rarely found in living systems cause a decrease in pH when acids are added to them. will always have a pH of 7 tend to maintain a relatively constant pH. are rarely found in living systems cause a decrease in pH when acids are added to them. will always have a pH of 7 ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Which of the following organic groups are found in naturally occuring amino acids? All of these Indole Imidazole Guanidinium ion All of these Indole Imidazole Guanidinium ion ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Polyprotic acids such as H3PO4, can act as acid-base buffers only in combination with polyprotic bases at pH values around any of their pKa's if their concentration is kept low at pH values around neutrality only in combination with polyprotic bases at pH values around any of their pKa's if their concentration is kept low at pH values around neutrality ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules The main difference between an acid and a base is that bases donate hydrogen ions in water while acids accept hydrogen ions acids are polar molecules and bases are not acids donate hydrogen ions in water while bases accept hydrogen ions bases are polar molecules and acids are not bases donate hydrogen ions in water while acids accept hydrogen ions acids are polar molecules and bases are not acids donate hydrogen ions in water while bases accept hydrogen ions bases are polar molecules and acids are not ANSWER DOWNLOAD EXAMIANS APP
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