"1nmol" - 1 õppematerjal

Üldloodusteadus

Vl M a Vl 18 1000 10 18 10 -3 N a )n = N ( H 2O) = n N A = 1 6 10 23 = 6 10 23 (molekuli) NA N b) n = N ( H 2O) = n N A = 10-6 6 10 23 = 6 1017 (molekuli) NA N c)n = N ( H 2O ) = n N A = 10 -9 6 10 23 = 6 1014 (molekuli) 20) NA Antud: a)n=1mol b)n=1mkmol c)n=1nmol CM=? N(H2O)=? Vastus: CM=55,6M; a)N=6×1023; b) N=6×1017; c) N=6×1014 n CM = n = CM V = 10 -7 10 -15 = 10 - 22 (mol ) V - 22 21) N = n N A N = CM V N A = 10 6,02 10 = 6,02 10 60( prootonit ) Antud: 23 pH=-logKa pH=7,0 7=-logKa -15 V(rakk)=10 l 107=Ka-1 N(H+)=? Ka=10-7=CM