The Kw of water varies with temperature. Calculate the pH of water at 30⁰C with a Kw = 1.469 x 10-14. Show all calculations leading to an answer.
@girlover @iceicebaby

Question

The Kw of water varies with temperature.  Calculate the pH of water at 30⁰C with a Kw = 1.469 x 10-14.  Show all calculations leading to an answer.
@girlover @iceicebaby

anonymous · Answer

plz i am so stuck

anonymous · Answer

Kw=[H+]*[OH-]    Kw=x^2   x=[H+]=[OH-]=(1.469*(10^(-14)))^(1/2)
pH=-log[H+]

anonymous · Answer

$$Kw=\sqrt{1.469\times10^{-14}}$$

anonymous · Answer

got it?

cuanchi · Answer

$$\left[ H ^{+} \right]=\sqrt{1.469 \times 10 ^{-14}}$$
$$pH=-\log[H ^{+}]= - \log \sqrt{1.469 \times 10 ^{-14}}= 6.92$$

anonymous · Answer

i'm not a calculator but i think that manner is right.