Phosphoric acid is a triprotic acid (Ka1 6 9 103, Ka2 6 2108, and ...

Phosphoric acid is a triprotic acid (Ka1 = 6.9Ã— 10â€“3, Ka2 = 6.2Ã— 10â€“8, and Ka3...

60.1K

Verified Solution

Question

Chemistry

Phosphoric acid is a triprotic acid (Ka1 = 6.9Ã— 10â€“3, Ka2 = 6.2Ã—10â€“8, and Ka3 = 4.8Ã— 10â€“13). To find the pH of a buffer composed ofH2PO4â€“(aq) and HPO42â€“(aq), which pKa value would you use in theHenderson-Hasselbalch equation?
Calculate the pH of a buffer solution obtained by dissolving15.0 g of KH2PO4(s) and 33.0 g of Na2HPO4(s) in water and thendiluting to 1.00 L.

Answer & Explanation Solved by verified expert

4.0 Ratings (782 Votes)

Before determining which pKa value would you use inthe HendersonHasselbalch equation we first of all need to knowWhat is HendersonHasselbalch equation brieflySo this equation is mainly used to determine the pH value of aBuffer solution using the acidity or pKa value of See Answer

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member