Hydrogen (or hydroxide) ion concentration from pH (or pOH)

1. A.
   $2.356\times10^{-5}$ M
2. B.
   $1.881\times10^{-5}$ M
3. C.
   $1.417\times10^{-5}$ M
4. D.
   $1.148\times10^{-5}$ M

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1. A.
   $1.97 \times 10^{- 4}$
2. B.
   $1.738 \times 10^{- 4}$
3. C.
   $1.84 \times 10^{- 4}$
4. D.
   $1.283 \times 10^{- 4}$

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1. A.
   $6.123 \times 10^{-5}$ M
2. B.
   $5.623 \times 10^{-5}$ M
3. C.
   $4.508 \times 10^{-5}$ M
4. D.
   $4.085 \times 10^{-5}$ M

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