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Question: Answered & Verified by Expert
What will be the pH of a solution formed by mixing 40 cm3 of 0.1 M HCl with 10 cm3 of 0.45 M NaOH?
ChemistryIonic EquilibriumJEE Main
Options:
  • A 10
  • B 8
  • C 5
  • D 12
Solution:
1170 Upvotes Verified Answer
The correct answer is: 12
Number of moles of HCl =MV1000=0.1×401000=0.004
Number of moles of NaOH =MV1000=0.45×101000=0.0045
Remaining moles of NaOH after neutralization = 0.0045 – 0.004 = 0.0005
Molarity of OH- =0.000550×1000=0.01M
So pOH =2
So pH = 14 – 2 = 12

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