Problem: A buffer consists of 0.50 M NaH2PO4 and 0.40 M Na2HPO4. Phosphoric acid is a triprotic acid (Ka1 = 7.2×10−3, Ka2 = 6.3×10−8, and Ka3 = 4.2×10−13).(b) What is the buffer pH?
FREE Expert Solution
Buffer Reaction: H2PO4- ⇋ HPO42- + H+
Calculate the pH using the Henderson Hasselbach equation:
- Use Ka2 = 6.3×10−8
Problem Details
A buffer consists of 0.50 M NaH2PO4 and 0.40 M Na2HPO4. Phosphoric acid is a triprotic acid (Ka1 = 7.2×10−3, Ka2 = 6.3×10−8, and Ka3 = 4.2×10−13).
(b) What is the buffer pH?
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Based on our data, we think this problem is relevant for Professor Aken's class at GMU.
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Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.