Value of Kw?

[Emily Vainberg 1D]

Is the value for Kw always 1x10^14? In the textbook that is the value they used for the example but I'm not sure if that is always the value.

[SarahSteffen_LEC4]

Yes, this is the value that is always used because it is a constant.

[Sebastian Lee 1L]

For the calculations we will be doing in 14A, this is the value for K_w. All this means is that in water at standard temperature and pressure, the concentration of hydronium ions [H₃O⁺] times the concentration of hydroxide ions [OH^-] is 1 x 10^-14. This tells us that pH + pOH is 14. However, the value of K_w can change if the temperature changes: at high temps, it increases so water is more acidic; at low temps, it decreases so water is more basic.

[605208780]

Yes. This is the constant value that should always be used.

[Leila_4G]

I don't remember learning this, will it be on the final?