Lab 14 Acid-Base Neutralization Name Section Date Postlab Questions 1. What is t
ID: 695879 • Letter: L
Question
Lab 14 Acid-Base Neutralization Name Section Date Postlab Questions 1. What is the definition of a weak acid? 2. Is acetic acid a strong acid or a weak acid? What is the experimental evidence fior your answer? 3. If you overshot the endpoint, how would that affect the percent ionization calculated? Explain. 4. If you had done the titration by adding vinegar to sodium hydroxide with phenolphthalein, what would you have observed at the endpoinn? 5. Write the ionization equation (with state descriptors) for cyanic acid, HCNO. Write the K, expression. Suppose 15 drops of cyanic acid. HCNOK.. 3.5 × 10 4), solution had been titrated with 41 drops of 0.22 M NaOH. Complete the table. (060 M, 0.015 M, 184, 2.4%) Lab 14 163Explanation / Answer
1. A weak acid is defined as an acid that dissociates incompletely, donating only few of its protons into the solution. Thus, it is not 100% ionizable like strong acid.
example: acetic acid, carbonic acid etc.
2. acetic acid is weak acid
by measuring the pH of equal concentration of HCl(strong acid) and acetic acid, the value of pH is always lower for HCl compared to acetic acid. pH = -log[H+]. so, more the protons lower will be the pH and number of protons depends on strength of acid.
4. the color of phenolphthalein in NaOH (base) is pink/violet and it is colorless in acidic medium. so, the colo of end point will be colorless
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.