11/2/2017 11:55 PM25.8/1000 10/30/2017 12:48 PM re O Assignment Info Puriodic Ta

Question

11/2/2017 11:55 PM25.8/1000 10/30/2017 12:48 PM re O Assignment Info Puriodic Table Question 8 of 17 Incorrect X Incorrect Available From: Due Date: Points Possible: Grade Category Sapling Learning How many grams of dipotassium succinate trihydrate (K C4HO 3H-O, MW 248.32 gimol) must be added to 720.0 mL of a 0.0385 M suocinic acid solution to produce a pH of 5.892? Succinic acid has pk values of 4.207 (pKen) and 5.636 (pka). Policies Number You can check ye You can view so give up on any c You can keep try until you get it r You lose 5% of answer in your attempt at that 1138 O eTextbook O Help With Thi ncorrect O Web Help & O Previous G ve Up & View Solution #Try Again Next -L O Technical Su Explanation Exit

Explanation / Answer

pH of buffer = pka2 + log(salt/acid)

    pka2 = 5.636

no of mol of succinic acid solution = 0.72*0.0385 = 0.02772 mol

no of mol of dipotassium trihydrate = x mol

5.892 = 5.636+log(x/0.02772)

x = 0.05 mol

mass of dipotassium trihydrate = 0.05*248.32 = 12.416 g

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

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