The hydrogen ion concentration of a 10 -8 M HCl aqueous solution at 298 K ( K w = 10 -14 ) is:-

1. A. 1.0 10 -6 M
2. B. 1.0525 10 -7 M
3. C. 9.525 10 -8 M
4. D. 1.0 10 -8 M

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