Solution Found!
A buffer is made by dissolving HC2H3O2 and NaC2H3O2 in
Chapter 14, Problem 100CQ(choose chapter or problem)
A buffer is made by dissolving \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\) and \(\mathrm{NaC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\) in water. (10.6)
a. Write an equation that shows how this buffer neutralizes added acid.
b. Write an equation that shows how this buffer neutralizes added base.
c. Calculate the pH of this buffer if it contains 0.10 M \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\) and 0.10 M \(\mathrm{C}_{2} \mathrm{H}_{3} \mathrm{O}_{2}^{-}\); the \(K_{\mathrm{a}}\) for \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2} \text { is } 1.8 \times 10^{-5}\).
d. Calculate the pH of this buffer if it contains 0.20 M \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\) and 0.40 M \(\mathrm{C}_{2} \mathrm{H}_{3} \mathrm{O}_{2}^{-}\); the\(K_{\mathrm{a}}\) for \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\) is \(1.8 \times 10^{-5}\).
Questions & Answers
QUESTION:
A buffer is made by dissolving \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\) and \(\mathrm{NaC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\) in water. (10.6)
a. Write an equation that shows how this buffer neutralizes added acid.
b. Write an equation that shows how this buffer neutralizes added base.
c. Calculate the pH of this buffer if it contains 0.10 M \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\) and 0.10 M \(\mathrm{C}_{2} \mathrm{H}_{3} \mathrm{O}_{2}^{-}\); the \(K_{\mathrm{a}}\) for \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2} \text { is } 1.8 \times 10^{-5}\).
d. Calculate the pH of this buffer if it contains 0.20 M \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\) and 0.40 M \(\mathrm{C}_{2} \mathrm{H}_{3} \mathrm{O}_{2}^{-}\); the\(K_{\mathrm{a}}\) for \(\mathrm{HC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\) is \(1.8 \times 10^{-5}\).
ANSWER:Step 1 of 4
a)
The buffer solution maintained the pH of solution by neutralizing the added acid or base.
A buffer solution is prepared by dissolving acetic acid and sodium acetate in water. Acetic acid is slightly dissociates in water to form 
As a buffer contains sodium acetate along with acetic acid , the concentration of acetate ions from sodium acetate is much larger.
The dissociation of acetic acid 
When a small amount of acid is added to a solution containing acetic acid and a sodium acetate buffer , 
The addition of a small amount of acid leads to a small decrease in the acetate ion concentration and a small rise in the acetic acid concentration.
However, the concentration of 
The equation for the neutralization of added acid by buffer as follows.
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