The concentration of the HI solution is 0.75M.
How do we calculate the required concentration?
Required concentration of any solution used in titration will be calculated by using the below equation as:
MāVā = MāVā, where
Mā & Vā are the molarity and volume of CsOH.
Mā & Vā are the molarity and volume of HI.
On putting all values from the question, we get
Mā = (1.9)(9.9) / (25) = 0.75M
Hence required concentration of HI solution is 0.75M.
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