Given Kw = [H+] [OH-] = 1.0× 10-¹⁴ at 25⁰C. What is the concentration of H⁴ in pure water at 25⁰C?

A ) 1× 10-⁷ mol dm-³ ✅

B ) 1× 10⁷ mol dm -³

C ) 1× 10 -¹⁴ mol dm-³

D ) 1×10 ¹⁴ mol dm-³

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