Which of the following aqueous solutions are good buffer systems? . a. 0.12 M calcium hydroxide + 0.29 M calcium bromide . b. 0.25 M perchloric acid + 0.16 M sodium perchlorate . c. 0.34 M hydrocyanic acid + 0.27 M sodium cyanide .

Question

18-07-2020
Chemistry

contestada

Which of the following aqueous solutions are good buffer systems? . a. 0.12 M calcium hydroxide + 0.29 M calcium bromide . b. 0.25 M perchloric acid + 0.16 M sodium perchlorate . c. 0.34 M hydrocyanic acid + 0.27 M sodium cyanide .

Respuesta :

ACCESS MORE ACCESS MORE ACCESS MORE ACCESS MORE

Otras preguntas

Using dimensional analysis 10) Lake Michigan holds 1.3 x 1015 gallons of water. If just Chicago removed water from the lake and it never rained again, how many

Solve four ninths plus nine eighteenths

What is equivalent to 4/-9?

Which political party has done more for the black community in history and why is there such a divide among the black community on who to politically back or no

f(b)-f(a) 10. a. Find the average rate of change for the function over the given interval (4 point b-a f(x) = x2 - x + 3 between x = 2 and x = 4

What is the height of a triangle with area 893 square inches and base 38 inches?

The wavelengths where a specific element can absorb or emit light are called

Pls Help dont get this

Which countries are members of NAFTA? Check all that apply. Brazil Canada Mexico Peru the United Kingdom the United States

Which events in the narrative develop the idea that the grandfather deserves the award? Select each correct answer. The grandfather served as a volunteer firefi

jufsanabriasa jufsanabriasa · Answer 1 · 2020-07-19T02:21:13+02:00

Answer:

c. 0.34 M hydrocyanic acid + 0.27 M sodium cyanide .

Explanation:

A buffer is defined as the aqueous mixture of a weak acid with its conjugate base or vice versa. Based on the systems:

a. 0.12 M calcium hydroxide + 0.29 M calcium bromide. IS NOT A GOOD BUFFER SYSTEM because Ca(OH)₂ is a strong base.

b. 0.25 M perchloric acid + 0.16 M sodium perchlorate. IS NOT A GOOD BUFFER SYSTEM because perchloric acid is a strong acid

c. 0.34 M hydrocyanic acid + 0.27 M sodium cyanide. IS A GOOD BUFFER SYSTEM because HCN is a weak acid, and its conjugate base, CN⁻, is obtained in the dissolution of NaCN as Na⁺ and CN⁻ ions.