one liter of HCl 0.01 M is dissolved in a million liters of pure water, what is the pH of this final solution?

Question

somebody says PH=8 as it is at the end HCl 10^-8 M
but it can get basic by adding acid

Rameshwar · Accepted Answer

0.01M = 10^-2 WHEN IT IS DISSOLVED IN 10^6 LITRES OFWATER THEN 
    [H+] = 10^2/10^6 = 10^-8 
 note------------- now we have to take into consideration the [H+] concentration of water '  
 i. e. total  [H+]  = 10^-8+ 10^-7
                           = 10^-8[1+10]
                           =  11x10^-8
  so   pH = - log[11x10^-8]
               = 8 - log11
               = 8 - 1.041 =  6.958   ANWER  [ it is 100% correct  .]
    so  the solution is acidic .  [ pH< 7 so acidic ]

luella · Answer

First you must to find the attention of HCl M=moles/liters M=2/1 M=1 pH=-log([H+]) when you consider that all the HCl will dissociate, you have the same attention of H+ as you do for HCl so pH=-log(2) pH=-.301 it is bad on account that that's how pH is measure thoratically nearly, that would no longer be the answer

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one liter of HCl 0.01 M is dissolved in a million liters of pure water, what is the pH of this final solution?

2 Answers