A pipe with length 3m and radius of 10cm has an outer layer of ice that is melting at the rate of 2picm^3 /min. How fast is the thickness of ice decreasing when ice is 2cm thick?

TLS Online TPP Program

#Question id: 376

#Section 4: Fundamentals of Biological Engineering

Phosphoric acid is tribasic, with pKa of 2.14, 6.86 and 12.4. The ionic form that predominates at pH 3.2 is

TLS Online TPP Program

#Question id: 377

#Section 4: Fundamentals of Biological Engineering

The aqueous solution with the highest pH is:

TLS Online TPP Program

#Question id: 378

#Section 4: Fundamentals of Biological Engineering

Which of the following statements about buffers is true?

TLS Online TPP Program

#Question id: 379

#Section 4: Fundamentals of Biological Engineering

A compound has a pKa of 7.4. To 100 mL of a 1.0 M solution of this compound at pH 8.0 is added 30 mL of 1.0 M hydrochloric acid. The resulting solution is pH:

TLS Online TPP Program

#Question id: 380

#Section 4: Fundamentals of Biological Engineering

The Henderson-Hasselbalch equation:

TLS Online TPP Program

#Question id: 381

#Section 4: Fundamentals of Biological Engineering

Consider an acetate buffer, initially at the same pH as its pKa (4.76). When sodium hydroxide (NaOH) is mixed with this buffer, the: