Practice question
Question
What is the pH of a mixture of 0.042 M NaH2PO4 and 0.42 M Na2HPO4 (pKa = 6.86)?
Explanation
quantitative reasoning analysis shows ratio, percentage and series logic determine correct calculation. Consequently 7.86 emerges as the valid choice since it meets mathematical and logical criteria, aligning with established principles in aptitude and reasoning literature.
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