Experiment 10 Prelaboratory Assignment Vinegar Analysis 1, Assuming the density

Question

Experiment 10 Prelaboratory Assignment Vinegar Analysis 1, Assuming the density of a 5% acetic acid by mass solution is 1.0 g/mL, determine the volume of the acetic acid solu- Date Lab Sec.--- Name Desk No. tion necessary to neutralize 25.0 ml, of 0,10 M NaOH. Also record this calculation on your Report Sheet. 2. a. A chemist often uses a white card with a black mark to aid in reading the meniscus of a clear liquid. How does this technique make the reading more accurate? Explain. b. A chemist should wait 10-15 seconds after dispensing a volume of titrant before a reading is made. Explain why the wait is good laboratory technique. 164 c. The color change at the endpoint should persist for 30 seconds. Esplain why the time lapse is a good titration technique. 3. Lemon juice has a pH of about 2.5. Assuming that the acidity of lemon juice is due solely to citric acid, that citric acid is a monoprotic acid, and that the density of lemon juice is 1.0 g/mL, then the citric acid concentration calculates to 0.5% by mass. Estimate the volume of 0.0100 M NaOH required to neutralize a 3.71-g sample of lemon juice. The molar mass of citric acid is 190.12 g/mol. Experiment 10 145

Explanation / Answer

Experiment 10 Prelaboratory Assignment Vinegar Analysis 1, Assuming the density

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

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