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JEE Main Chemistry question

ChemistryEquilibriumJEE Main

One litre of 1 M solution of an acid ( at 25°C) has pH . It is diluted with water so that the new pH becomes double. The solution was diluted to mL. The value of is:

Answer: 6

Solution

Using the more exact relation (not dropping relative to , since is comparable to here): Initial check: , : ✓ (consistent with given data) New pH $= 2×2 = 4

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Question ID VK-136563