haylie1456
24.07.2019 •
Chemistry
Metallic or nonmetallic elements or compounds of elements that occur naturally in earth's crust are
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Ответ:
Ответ:
pH = 4.584
Explanation:
CH3COOH ↔ CH3COO- + H3O+for buffer solution, Henderson-Hauselbach equation:
pH = pKa + log [A-]/[HA]∴ HA: CH3COOH
∴ pKa = 4.76
⇒ [CH3COOH] = ((60.0 mmol)×(mol/1000 mmol))/(1.00 L) = 0.06 M
⇒ [CH3COO-] = ((40.0 mmol)×(mol/1000 mmol)/(1.00 L) = 0.04 M
⇒ pH = 4.76 + log (0.04/0.06)
⇒ pH = 4.76 + ( - 0.176 )
⇒ pH = 4.584