#Question id: 382
#XL - S Microbiology
The molar ratio of sodium acetate to acetic acid in a buffer solution with a pH OF 5.76 is 10:1. Assuming the total buffer concentration is 2.2 X 10-2 mol/L, how many grams of sodium acetate (m.w. 82) and how many grams of acetic acid (m.w. 60) should be used in preparing a litre of the solution?
#Question id: 383
#XL - S Microbiology
Three buffers are made by combining a 1 M solution of acetic acid with a 1 M solution of sodium acetate in the ratios shown below
|
1 M acetic acid |
1 M sodium acetate |
|
Buffer 1: 10 mL |
90 mL |
|
Buffer 2: 50 mL |
50 mL |
|
Buffer 3: 90 mL |
10 mL |
Which of these statements is true of the resulting buffers?
#Question id: 385
#XL - S Microbiology
In which reaction below does water not participate as a reactant (rather than as a product)?
#Question id: 386
#XL - S Microbiology
Which of the following properties of water does not contribute to the fitness of the aqueous environment for living organisms?
#Question id: 387
#XL - S Microbiology
For a weak acid with a pKa of 6.0, What would be the ratio of acid to salt at pH 5.
#Question id: 388
#XL - S Microbiology
Calculate the pH of a solution prepared by mixing 2.0 mL of a strong acid solution of pH=3.0 and 3.0 mL of a strong base of pH=10.0.