Jka diketahui PH larutan NaF=8,09 dan harga Ka NaF=6,7.10 pangkat min 10. Tentukan konsentrasi NaF !
fatihahalhusna
![pH=8,09\\pOH=5,91\\{[OH^-]}=10^{-5,91}=1,23\times10^{-6}\ M\\\\{[OH^-]}=\sqrt{\frac{K_w\times M}{K_a}}\\\\1,23\times10^{-6}=\sqrt{\frac{10^{-14}\times M}{6,7\times10^{-10}}}\rightarrow Kuadratkan\\\\1,5\times10^{-12}\times6,7=10^{-4}M\\\\M=\boxed{\boxed{\bold{10^{-7}\ M}}}](https://tex.z-dn.net/?f=pH%3D8%2C09%5C%5CpOH%3D5%2C91%5C%5C%7B%5BOH%5E-%5D%7D%3D10%5E%7B-5%2C91%7D%3D1%2C23%5Ctimes10%5E%7B-6%7D%5C+M%5C%5C%5C%5C%7B%5BOH%5E-%5D%7D%3D%5Csqrt%7B%5Cfrac%7BK_w%5Ctimes+M%7D%7BK_a%7D%7D%5C%5C%5C%5C1%2C23%5Ctimes10%5E%7B-6%7D%3D%5Csqrt%7B%5Cfrac%7B10%5E%7B-14%7D%5Ctimes+M%7D%7B6%2C7%5Ctimes10%5E%7B-10%7D%7D%7D%5Crightarrow+Kuadratkan%5C%5C%5C%5C1%2C5%5Ctimes10%5E%7B-12%7D%5Ctimes6%2C7%3D10%5E%7B-4%7DM%5C%5C%5C%5CM%3D%5Cboxed%7B%5Cboxed%7B%5Cbold%7B10%5E%7B-7%7D%5C+M%7D%7D%7D "pH=8,09\\pOH=5,91\\{[OH^-]}=10^{-5,91}=1,23\times10^{-6}\ M\\\\{[OH^-]}=\sqrt{\frac{K_w\times M}{K_a}}\\\\1,23\times10^{-6}=\sqrt{\frac{10^{-14}\times M}{6,7\times10^{-10}}}\rightarrow Kuadratkan\\\\1,5\times10^{-12}\times6,7=10^{-4}M\\\\M=\boxed{\boxed{\bold{10^{-7}\ M}}}")
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ilaafriliana15
POH nya dpt drmn kak?
fatihahalhusna
pH+pOH = 14--> pOH=14-8,09=5,91
ilaafriliana15
OH- nya kak? yg 10^-5,91
fatihahalhusna
gunakan kalkulator windows = 1,23x10^-6
ilaafriliana15
hsilnya 10^5,91 ya kak? maaf ya kiak bnya tnya, cma skdr pngn tw aja cranya gmna
fatihahalhusna
ya
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