Explain hydrolysis, i.e, what types of molecules undergo hydrolysis (be specific
ID: 491407 • Letter: E
Question
Explain hydrolysis, i.e, what types of molecules undergo hydrolysis (be specific) and show equations for reactions of acid, base, and salt hydrolysis You prepare a buffer by adding 10.0 mL of 0.10 M acetic acid and 10.0 mL of 0.10 M sodium acetate.
Calculate the pH that you expect for this buffer. Write the chemical equation for the equilibrium. Show your work using an ICE table. To the solution from #4, you add 0.50 mL of 0.10 M HCl. Calculate the new pH of the buffer solution.
Write the chemical equations for the reaction and the equilibrium. Show your work using an ICE table. To the solution from #4, you add 0.50 mL of 0.10 M NaOH. Calculate the new pH of the buffer solution. Write the chemical equation for the equilibrium. Show your work using an ICE table.
Explanation / Answer
millimoles of acetic acid = 10 x 0.1 = 1
millimoles of sodium acetate = 10 x 0.1 = 1
CH3COOH + NaOH ----------------> CH3COONa + H2O
2 1 0 0 ------------- initial
-1 -1 +1 +1 ------------ change
1 0 1 1 ------------- equilibrium
pH = pKa + log [salt / acid]
= 4.74 + log [sodium acetate / acetic acid]
= 4.74 + log (1/1)
pH = 4.74
2)
millimoles of HCl added = 0.5 x 0.1 = 0.05 (C)
pH = pKa + log [salt - C / acid + C]
= 4.74 + log [1 - 0.05 / 1 + 0.05]
pH = 4.70
millimoles of NaOH added = 0.50 x 0.1 = 0.05
pH = pKa + log [salt + C / acid - C]
= 4.74 + log [1 + 0.05 / 1 - 0.05]
= 4.78
pH = 4.78
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.