Which of the following would be appropriate conjugate acid/base systems for a bu

Question

Which of the following would be appropriate conjugate acid/base systems for a buffer? NH_3/NH_4^-. HC_2H_3O_2/NaC_2H_3O_2 HCl/NaOH What is chemical equilibrium? What are chemical kinetics? What does a change in temperature do to the kinetics of a reaction? What does a change in concentration do to the kinetics of a reaction? What is a catalyst and how does it work? Understand activation energy. According to the following equation, what would happen to the concentration of each of the species if the concentration of N_2O_3 were increased? If the concentration of NO_2 were decreased? If the pressure were increased? 2 N_2O_3 (g) beta a 4 NO_2 (g) + O_2 (g) According to the equation above, what would be the equilibrium expression? What would be the equilibrium constant if [N_2O_5] = 0.50 M, [NO_2] = 0.100 M, and [O_2] = 0.025 M? Write the equilibrium expression for the following chemical reaction: CaCO_3 (s) beta a CaO (s) + CO_2 (g)

Explanation / Answer

Q18.

buffer --> must contain a weak acid + conjugate base or a weak base + conjugate acid

NH3 and NH4+ --> good buffer, since weak base + conjugate acid

HC2H3O and NaC2H3O -->good buffer, since weak acid+ conjugate base

bad for a buffer

HCl and NaOH, since strong acid and strong base

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