#Question id: 387
#Unit 1. Molecules and their Interaction Relevant to Biology
For a weak acid with a pKa of 6.0, What would be the ratio of acid to salt at pH 5.
#Question id: 389
#Unit 1. Molecules and their Interaction Relevant to Biology
A weak acid HA has a pKa of 5.0. If 1.0 mol of this acid and 0.1 mol of NaOH were dissolved in one liter of water, what would the final pH be?
#Question id: 390
#Unit 1. Molecules and their Interaction Relevant to Biology
What are the properties arising due to varying concentrations of solute in a given solvent, irrespective of the nature of solute with respect to the solvent?
#Question id: 391
#Unit 1. Molecules and their Interaction Relevant to Biology
In a hospital laboratory, a 10.0 mL sample of gastric juice, obtained several hours after a meal, was titrated with 0.1 M NaOH to neutrality; 7.2 mL of NaOH was required. The patient’s stomach contained no ingested food or drink, thus assume that no buffers were present. What was the pH of the gastric juice?
#Question id: 393
#Unit 1. Molecules and their Interaction Relevant to Biology
Carbon dioxide (CO2) is readily soluble in water, according to the equation CO2 + H2O ↔ H2CO3. Carbonic acid (H2CO3) is a weak acid. If CO2 is bubbled into a beaker containing pure, freshly distilled water, which of the following graphs correctly describes the results?
#Question id: 400
#Unit 1. Molecules and their Interaction Relevant to Biology
Consider two solutions: solution X has a pH of 4; solution Y has a pH of 7. From this information, we can reasonably conclude that ________.