Jika satu liter larutan NH4Cl mempunyai ph = 5 (kb=10^-5),maka larutan tersebut mengandung NH4CL sebanyak…gram.(Ar N= 14, Cl=35,5,h=1)
535 53,5 26,75 5,35 2,675" Life is not a problem to be solved but a reality to be experienced! "
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Jika satu liter larutan NH4Cl mempunyai ph = 5 (kb=10^-5),maka larutan tersebut mengandung NH4CL sebanyak…gram.(Ar N= 14, Cl=35,5,h=1
NH4Cl = garam bervalensi satu
pH NH4Cl= 5
H+ = 10^-5
NH4Cl ---> NH4+ + Cl-
asam konjugasi kuat basa konjugasi lemah
NH4+ + H2O -----> NH4OH + H+
H+ = akar {(Kw/kb)x Mgaram x valensi}
10^-5= akar {(10^-14/10^-5) x M garam x 1}
(10^-5)^2= {10^-9 x M garam}
M garam = 10^10/10^-9
M garam = 10^-1 = 0,1 M
V = 1 Liter = 1000 mL
M = gram/Mr x 1000/V
0,1 = gram/53,3 x 1000/1000
gram = 0,1 x 53,5 = 5,35 gram
semoga membantu :)
semangat belajar ya :D
beri label terbaik ya :)