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.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

c (diamond),

sio2 (quartz)