#Question id: 371
#Unit 1. Molecules and their Interaction Relevant to Biology
How many milliliters of a 2.0 M solution of boric acid must be added to 600 mL of a solution of 10 mM sodium borate in order for the pH to be 9.45? (pKa of boric acid = 9.24)
#Question id: 372
#Unit 1. Molecules and their Interaction Relevant to Biology
Carbon dioxide in the atmosphere dissolves with the raindrops. The pH of raindrops is ________.
#Question id: 373
#Unit 1. Molecules and their Interaction Relevant to Biology
What is the hydroxyl ion (OH-) concentration of a solution of pH 8?
#Question id: 374
#Unit 1. Molecules and their Interaction Relevant to Biology
The pH of a sample of blood is 7.4, while gastric juice is pH 1.4. The blood sample has:
#Question id: 375
#Unit 1. Molecules and their Interaction Relevant to Biology
The aqueous solution with the lowest pH is:
#Question id: 376
#Unit 1. Molecules and their Interaction Relevant to Biology
Phosphoric acid is tribasic, with pKa of 2.14, 6.86 and 12.4. The ionic form that predominates at pH 3.2 is