= ([H+][OH-]) / [H2O] = 1,8 . 10-16.
, : [H2O] = const = 1000/18 = 55,5 /. [H2O] = 1,8 10-16. 55,5 = 10-14. [H2O] w. w = [H+][OH-] = 10-14.
[H+] = [OH-] = 10-7 /. [H+] [OH-], .
= -lg [H+]. , [H+] = [OH-] =10-7; pH = 7; [H+] > [OH-], pH < 7; [H+] < [OH-], pH > 7.
3. 0,05 %- NaOH, , NaOH .
.
1. m (NaOH) -?
, 1 , m () = V r =
= 1000 . 1/ = 1000 .
2. m (NaOH) -?
m (NaOH) = m (). w() = 1000 . 0,0005 = 0,5 .
3. (NaOH) -?
NaOH = 0,05/40 = 0,0125 /.
4. [OH-] -?
NaOH , [OH-] = NaOH, [OH-] = 0,0125 /.
5. [H+] -?
[H+]= = = 810-13 /.
6. pH -?
= - lg [H+] = - lg 810-13 = 12,1.
³: 12,1.
1. ? : H2SO3, Al(OH)3, K2SO4, Na3PO4, NH4H2PO4, Al(OH)2Cl.
2. ?
3. .
4. ?
5. , , .
6. 0,01 . MgCl2 18 , 66 %.
7. pH? pH 0,15 . (K = 1,0.10-5), 0,15 . Hl.
8. KOH, pH 10.
9. HNO2 5,1.106. 0,01 .
10. a - 0,1 . NH4OH, = 1,77.10-5.
11. 178,5 Kr 900 H2O 1,7. 50 , 50 12334 .