contestada

A student prepares a solution by combining 100 mL of 0.30 M HNO2(aq) and 100 mL of 0.30 M KNO2(a). Which of the following equations represents the reaction that best helps to explain why adding a few drops of 1.0 M HCI(aą) does not significantly change the pH of the solution? (A) K*(aq) + CI (aq) ---------------->KCl(s)(B) HNO2(aą) ----------------->H'(aą) + NO2 (aq) (C) H (aq) + OH (aq) ----------------->H2O(l)

Respuesta :

Answer:

B

Explanation:

This creates a buffer solution meaning it will just neutralize out and does not change the PH massively.

H (aq) + OH (aq) ----------------->H2O(l)

HNO2(aą) ----------------->H'(aą) + NO2 (aq)

The above two equations represent the reaction that indicates that the adding a few drops of 1.0 M HCI does not significantly change the pH of the solution.

Molecules that acts like a buffer

HNO2 is a weak acid and NO2 is conjugate base of HNO2 so it will form a buffer Solution while on the other hand, Water is a buffer because H20 self ionizes to form H30+ and OH-. In order to form an acidic buffer, a weak acid with the conjugate base is needed.

Learn more about buffer here: https://brainly.com/question/1385846

Learn more: https://brainly.com/question/14820432

ACCESS MORE
ACCESS MORE
ACCESS MORE
ACCESS MORE

Otras preguntas