13Then what?
What is the pH of water at 0ºC ?
7
7.69
6.48
undefined
may b a very Stupid question....:P
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11 Answers
33Then write..
Keq of the reaction and write that equation...
something like... [7] ln(K2/K1)=ΔH/R(1/T1-1/T2)
Yahi hai naa [7]
may be.. then find K00C then ... kuch kuch karo... :)
13i m Stuck!!!
i think it is undefined...but not sure...
33Nooo it should be defined... why undefined..
example...
at 1000C
if pH is 7 soln is basic...
:)
1357As temperature is decreased Kw decreases
so pH of water increases
it should be greater than 7
13pH ofwater is taken to be standard its pH value at 298K ...then how can you chage the standard ?? Water can never be acidic or basic... it is always neutral....again i m not sure!!!!@$!$
so... boiling water is an acid!!!???
1357Yes it is neutral
At 298K Kw=10-14
so [H+]=[OH-]
so pH=7
now as temperature is decreased Kw decreases, let it be 10-15 at any temperature
then [H+]=[OH-]=10-7.5
pH=7.5 and it is still neutral
1its pH is 7.69 as temp. decreases so Kw decreases so i think most appropiate is 7.69 as it can be said about this change and 6.48 must be near 80-110°C