then X= ....... 
#Question id: 370
#Section 4: Fundamentals of Biological Engineering
Which of the following statements is true about buffer solutions?
#Question id: 371
#Section 4: Fundamentals of Biological Engineering
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
#Section 4: Fundamentals of Biological Engineering
Carbon dioxide in the atmosphere dissolves with the raindrops. The pH of raindrops is ________.
#Question id: 373
#Section 4: Fundamentals of Biological Engineering
What is the hydroxyl ion (OH-) concentration of a solution of pH 8?
#Question id: 374
#Section 4: Fundamentals of Biological Engineering
The pH of a sample of blood is 7.4, while gastric juice is pH 1.4. The blood sample has:
#Question id: 375
#Section 4: Fundamentals of Biological Engineering
The aqueous solution with the lowest pH is: