11.4;
Объяснение:
pOH = -lg[OH-] ; pH = 14 - pOH;
n(NaOH) = n(OH) = m(NaOH) /M(NaOH) = 0.1/40 =
0.0025 (моль) ;
[OH-] = n(OH-) /V = 0.0025/1 = 0.0025 (моль/л) ;
pH = 14 - (-lg0.0025) = 14 - 2.6 = 11.4;
11.4;
Объяснение:
pOH = -lg[OH-] ; pH = 14 - pOH;
n(NaOH) = n(OH) = m(NaOH) /M(NaOH) = 0.1/40 =
0.0025 (моль) ;
[OH-] = n(OH-) /V = 0.0025/1 = 0.0025 (моль/л) ;
pH = 14 - (-lg0.0025) = 14 - 2.6 = 11.4;