Expermert # 15Volmeric Anayss-pH Teations Additional Questions bases) dissolved

Question

Expermert # 15Volmeric Anayss-pH Teations Additional Questions bases) dissolved in the 7. The most common buffers are salts of weak acids (or acid (or weak base). The most effective buffer system i concentrations of the weak acid (or base) and the acid (or base) salt are the Examine your pH graph for WAVSB achieved, when the same (a) What evidence do you have for a buffer system? (b) Where did the salt come from to create the buffer system? (c) On the pH curve, identify the point of the most effective buffer system. (d) Identify the major species present after the OH reacts completely at the following points or in the following regions. (i) 0 ml NaOH added. (i) between 0 ml NaOH added and the equivalence point. (ii) at the equivalence point. (iv)after the equivalence point. 8. Explain why indicators cannot be satisfactorily used, when dilute sulfurous acid is titrated against 0-10M ammonium hydroxide. 82

Explanation / Answer

(8)

This is because sulfurous acid is a weak acid and also ammonium hydroxide is also a weak base. And in the titration reaction between a weak acid and weak base, no indicator can be satisfactorily used because the equivalence point pH cannot be judged easily.

Hope this helps !

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

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