#Question id: 362
#Unit 1. Molecules and their Interaction Relevant to Biology
A 0.01 M solution of a substance has a pH of 2. What can you conclude about this substance?
#Question id: 363
#Unit 1. Molecules and their Interaction Relevant to Biology
What is the pH of a mixture of 0.042 M NaH2PO4 and 0.058 M Na2HPO4? If 1.0 mL of 10.0 M NaOH is added to a liter of the buffer prepared, how much will the pH change? (pKa = 6.86)
#Question id: 364
#Unit 1. Molecules and their Interaction Relevant to Biology
A solution contains 0.0000001 (10-7) moles of hydrogen ions [H+] per liter. Which of the following best describes this solution?
#Question id: 365
#Unit 1. Molecules and their Interaction Relevant to Biology
Water is a polar molecule: the oxygen atom with its unshared electrons carries a partial negative charge (δ−) of ___________, and the hydrogen atoms each carry a partial positive charge (δ+) of __________, where e is the charge of the electron.
#Question id: 366
#Unit 1. Molecules and their Interaction Relevant to Biology
What is the pH of a solution with a hydroxyl ion (OH-) concentration of 10-10 M?
#Question id: 367
#Unit 1. Molecules and their Interaction Relevant to Biology
1.0 × 10^−4 mole of H+ (as HCl) is added to 1.0 liter of pure water. Determine the final pH of the solution.