Question 4 of 7 Map pling Reset The flask shown here contains 0.767 g of acid an

Question

Question 4 of 7 Map pling Reset The flask shown here contains 0.767 g of acid and a few drops of phenolphthalein indicator dissolved in water. The buret 15 contains 0.240 M NaOH. What volume of base is needed to reach the end 20 point of the titration? 30 Number 25 35 mL base 40 45 What is the molar mass of the acid (assuming it is diprotic and that the end point corresponds to the second equivalence point? Add base to the solution until it just turns pink. You may need to reset the titration if Number you go past the end point. g/mol A Previous ® Give Up & View Solution Check Answer Next Ext O Hint

Explanation / Answer

asper the given data

Volume of base = 20 ml

Molarity of base = 0.24 M

No of mole of base = 20/1000*0.24 = 0.0048 mol

so that as the acid is diprotic

No of mole of acid = 0.0048/2 = 0.0024 mol

molarmass of acid = w/n = 0.767/0.0024 = 319.6 g/mol

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

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