Which one of the following has highest pH?

Question

Which one of the following has highest pH? (A) Distilled water (B)  1M NH3  (C)  1M NaOH  (D) Water saturated with chlorine

Tardigrade Admin · Accepted Answer

Pure water has pH=7 NH3 solution is weakly, basic. So, pH>7 but not too large for 1 text M text NaOH, text ! ![ ! ! text OH-]=1, [H+]=(10-14/[OH-])=10-14 Hence, pH=-log text 10-14=14. Cl2+HO xrightarrow[]HCl+HClO Hence, the solution is acid or pH<7 .

Q. Which one of the following has highest pH?

Distilled water

$1 M N H_{3}$

$1 M N a O H$

Water saturated with chlorine

Pure water has $p H = 7$ $N H_{3}$ solution is weakly, basic. So, $p H > 7$ but not too large for $1 M N a O H, [O H^{-}] = 1,$ $[H^{+}] = \frac{10 ^{- 14}}{[ O H ^{-} ]} = 10^{- 14}$ Hence, $p H = - l o g 10^{- 14} = 14.$ $C l_{2} + H O H Cl + H ClO$ Hence, the solution is acid or $p H < 7$ .

Q. Which one of the following has highest pH?

Distilled water

1MNH3​

1MNaOH

Water saturated with chlorine

Pure water has pH=7 NH3​ solution is weakly, basic. So, pH>7 but not too large for 1MNaOH,[OH−]=1, [H+]=[OH−]10−14​=10−14 Hence, pH=−log10−14=14. Cl2​+HO​HCl+HClO Hence, the solution is acid or pH<7 .

$1 M N H_{3}$

$1 M N a O H$

Pure water has $p H = 7$ $N H_{3}$ solution is weakly, basic. So, $p H > 7$ but not too large for $1 M N a O H, [O H^{-}] = 1,$ $[H^{+}] = \frac{10 ^{- 14}}{[ O H ^{-} ]} = 10^{- 14}$ Hence, $p H = - l o g 10^{- 14} = 14.$ $C l_{2} + H O H Cl + H ClO$ Hence, the solution is acid or $p H < 7$ .