Ke dalam 200 mL larutan NH4OH 0,2 M dicampurkan larutan NH4Cl dengan volume dan konsentrasi yg sama, ph larutan adalah.... (kb = 10^-5)
a. 5
b.6
c.8
d.9
e,10
bantu pakai caranya ya
a. 5
b.6
c.8
d.9
e,10
bantu pakai caranya ya
fatihahalhusna
![Diketahui:\\mmol\ NH_4OH=200\times0,2=20\ mmol\\mmol\ NH_4Cl=200\times0,2=20\mmol\\K_b=10^{-5}\\Ditanya:\\pH=---?\\=======================\\Jawab:\\\displaystyle [OH^-]=K_b\times\frac{mmol\ NH_4OH}{mmol\ NH_4Cl}\\\\~~~~~~~~~=10^{-5}\times\frac{20}{20}\\\\~~~~~~~~~=10^{-5}\\\\pOH=5\\\\\boxed{\boxed{\bold{pH=9}}}](https://tex.z-dn.net/?f=Diketahui%3A%5C%5Cmmol%5C+NH_4OH%3D200%5Ctimes0%2C2%3D20%5C+mmol%5C%5Cmmol%5C+NH_4Cl%3D200%5Ctimes0%2C2%3D20%5Cmmol%5C%5CK_b%3D10%5E%7B-5%7D%5C%5CDitanya%3A%5C%5CpH%3D---%3F%5C%5C%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%3D%5C%5CJawab%3A%5C%5C%5Cdisplaystyle+%5BOH%5E-%5D%3DK_b%5Ctimes%5Cfrac%7Bmmol%5C+NH_4OH%7D%7Bmmol%5C+NH_4Cl%7D%5C%5C%5C%5C%7E%7E%7E%7E%7E%7E%7E%7E%7E%3D10%5E%7B-5%7D%5Ctimes%5Cfrac%7B20%7D%7B20%7D%5C%5C%5C%5C%7E%7E%7E%7E%7E%7E%7E%7E%7E%3D10%5E%7B-5%7D%5C%5C%5C%5CpOH%3D5%5C%5C%5C%5C%5Cboxed%7B%5Cboxed%7B%5Cbold%7BpH%3D9%7D%7D%7D "Diketahui:\\mmol\ NH_4OH=200\times0,2=20\ mmol\\mmol\ NH_4Cl=200\times0,2=20\mmol\\K_b=10^{-5}\\Ditanya:\\pH=---?\\=======================\\Jawab:\\\displaystyle [OH^-]=K_b\times\frac{mmol\ NH_4OH}{mmol\ NH_4Cl}\\\\~~~~~~~~~=10^{-5}\times\frac{20}{20}\\\\~~~~~~~~~=10^{-5}\\\\pOH=5\\\\\boxed{\boxed{\bold{pH=9}}}")
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