#Question id: 398
#Unit 1. Molecules and their Interaction Relevant to Biology
One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is a weak acid that, when placed in an aqueous solution, dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+). (See figure.)
If the pH of blood drops, one would expect ________.
#Question id: 399
#Unit 1. Molecules and their Interaction Relevant to Biology
Calculate the pH of a 1 L solution containing 0.100 M formic acid and 0.100 M sodium formate before and after the addition of 1.00 mL of 5.00 M NaOH. How much would the pH change if the NaOH were added to 1.00 L of pure water? (pKa for formic acid is 3.75)
#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 ________.
#Question id: 401
#Unit 1. Molecules and their Interaction Relevant to Biology
.Which of the following graphs describes the relationship between [H3O+] and pH?
#Question id: 402
#Unit 1. Molecules and their Interaction Relevant to Biology
If the DG'° of the reaction A -> B is –40 kJ/mol, under standard conditions the reaction:
#Question id: 403
#Unit 1. Molecules and their Interaction Relevant to Biology
For the reaction A -> B, DG'° = –60 kJ/mol. The reaction is started with 10 mmol of A; no B is initially present. After 24 hours, analysis reveals the presence of 2 mmol of B, 8 mmol of A. Which is the most likely explanation?