25.0 ml of 1.25 M NaOH(aq) was neutralized by 18.7 ml of HCl(aq) solution. What is the concentration of the HCl solution ?

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

the answer is na (sodium)

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