At 80^ C , distilled water has H ⁺ ions concentration equal to 1 10⁻⁶ ~mole / litre. The value of K_w at this temperature will be

Step-by-step solution

[ H ₃ O ⁺ ]=1 10⁻⁶ ~mol ~L ~L ⁻¹ or [ H ⁺ ]=1 10⁻⁶ ~mol ~L ⁻¹ As for distilled water [ H ⁺ ]= [ OH ⁻ ] aligned & [ H ⁺ ]= [ OH ⁻ ]=1 10⁻⁶ ~mol ~L ⁻¹ & ~K _w= [ H ⁺ ] [ OH ⁻ ]=10⁻¹² ~mol ^2 ~L ⁻² aligned