#Question id: 365
#Part-A Aptitude & General Biotechnology
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
#Part-A Aptitude & General Biotechnology
What is the pH of a solution with a hydroxyl ion (OH-) concentration of 10-10 M?
#Question id: 367
#Part-A Aptitude & General Biotechnology
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.
#Question id: 369
#Part-A Aptitude & General Biotechnology
Calculate the pH of a 2.0 L solution containing 10 mL of 5 M acetic acid and 10 mL of 1 M sodium acetate. (pKa = 4.76)
#Question id: 371
#Part-A Aptitude & General Biotechnology
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
#Part-A Aptitude & General Biotechnology
Carbon dioxide in the atmosphere dissolves with the raindrops. The pH of raindrops is ________.