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Question: Answered & Verified by Expert
100 mL of a solution with pH = 6 is diluted to 1000 mL by adding water. pH will
ChemistryIonic EquilibriumNEET
Options:
  • A decrease by 0.7 unit
  • B increase by 1 unit
  • C increase by 9 units
  • D increase by 0.7 unit
Solution:
1189 Upvotes Verified Answer
The correct answer is: increase by 0.7 unit
pH = 6
[H+]=10-6M
100×10-6=M×1000 or M=10-7
[H+] already present in water =10-7
Total [H+]=10-7+10-7=2×10-7
pH=-log2×10-7=7-log2
pH=7-0.3010=6.7

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