Which pair of concentrations results in the most effective buffer? which pair of concentrations results in the most effective buffer? a.) 0.10 m ha; 0.90 m a−. b.) 0.50 m ha; 0.50 m a−. c.) 0.10 m ha; 0.10 m a−. d.) 0.90 m ha; 0.10 m a−

The pair that results in the most effective buffer is .50 M Ha and .50 M A-.

A buffer's capacity is the pH range where it works as an effective buffer, preventing large changes in pH upon addition of an acid or base.

The correct answer between all the choices given is the second choice or letter B. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm