Practice question
Question
The second pKa of phosphoric acid is 6.8. The ratio of Na ₂ HPO ₄ to NaH ₂ PO ₄ required to obtain a buffer of pH 7.0 is (rounded off to two decimal places).
Explanation
The principle of enzyme kinetics explains that substrate binding and catalytic efficiency determine reaction rates. Hence Option NAT fits best because it reflects active-site specificity and regulation, as documented in authoritative sources on biochemistry.
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