#Question id: 383
#Section 4: Fundamentals of Biological Engineering
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: 384
#Section 4: Fundamentals of Biological Engineering
A solution was prepared by dissolving 0.02 moles of acetic acid (HOAc; pKa = 4.8) in water to give 1 liter of solution. What is the pH? To this solution was then added 0.008 moles of concentrated sodium hydroxide (NaOH). What is the new pH? (In this problem, you may ignore changes in volume due to the addition of NaOH).
#Question id: 385
#Section 4: Fundamentals of Biological Engineering
In which reaction below does water not participate as a reactant (rather than as a product)?
#Question id: 386
#Section 4: Fundamentals of Biological Engineering
Which of the following properties of water does not contribute to the fitness of the aqueous environment for living organisms?
#Question id: 387
#Section 4: Fundamentals of Biological Engineering
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
#Section 4: Fundamentals of Biological Engineering
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.