5. Sodium hydroxide is commonly used in acid-base titrations as a standard solut

Question

5. Sodium hydroxide is commonly used in acid-base titrations as a standard solution - that is solution of concentration so well known that it can be used to accurately and precisely e the concentration of other solutions. For example, let suppose that we want to know the concentration of acetic acid, HCH;CO2, in vinegar (acetic acid is the active ingredient). To accomplish this, a 0.1055 M sodium hydroxide standard solution is used to titrate 2.0000 ml of HEB vinegar. This requires 16.49 ml of the sodium hydroxide solution. What is the molarity of acetic acid in vinegar? Please use dimensional analysis to solve this problem? (Answer: 0.8699 M)

Explanation / Answer

For the neutralization the balanced equation is

NaOH + CH3COOH -------------> CH3COONa + H2O

Thus mmoles of acid = mmoles of base used

mmoles of acid = Molarity x 2.000mL

mmoles of base = 16.49mL x 0.1055 M

Thus molarity of acid = 16.49mL x 0.1055M / 2.000mL

= 0.8699M

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.