If pKw=13.36 at 50° C, the pH of pure water at the same temperature is:

Question

If pKw=13.36 at 50° C, the pH of pure water at the same temperature is: (A) 7.00 (B) 6.68 (C) 7.63 (D) 6.00

Tardigrade Admin · Accepted Answer

pKw=13.36 (temperature =50° C ) pH of water = ? (temperature =50° C ) pKw=pH+pOH (for pure water pH=pOH ) ∴ pKw=2pH By putting the values 13.36=2× pH pH=(13.36/2)=6.68

Q. If $p K_{w} = 13.36$ at $50^{\circ} C,$ the pH of pure water at the same temperature is:

7.00

6.68

7.63

6.00

zero

$p K_{w} = 13.36$ (temperature $= 50^{\circ} C$ )
pH of water = ? (temperature $= 50^{\circ} C$ )
$p K_{w} = p H + pO H$ (for pure water $p H = pO H$ )
$∴$ $p K_{w} = 2 p H$
By putting the values $13.36 = 2 \times p H$
$p H = \frac{13.36}{2} = 6.68$

Q. If pKw​=13.36 at 50∘C, the pH of pure water at the same temperature is: