Garam Kristal ~ Muf Firajullah

Thursday, March 24, 2011

Posted by Mufti on 12:40 AM

Jika 38 gram MgSO₄.XH₂O dipanaskan menghasilkan 20 gram garam anhidrat Mr MgSO4 = 120 dan Mr H2O =18 harga X diatas adalah

Penyelesaian:

MgSO₄.XH₂O $\Longrightarrow$ MgSO₄ + X H₂O

MgSO₄.XH₂0 = 38 gram

MgSO₄ = 20 gram

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xH₂O = 18 gram

Mol MgSO₄ = $\frac{20}{120}$ = $\frac{1}{6}$ mol

Mol H₂O = $\frac{18}{18}$ = 1 mol

Perbandingan koefisien reaksi =perbandingan mol yang bereaksi

$\frac{Mol H2O}{Mol MgSO4}$ = $\frac{X}{1}$

$\frac{1}{1/6}$ = $\frac{X}{1}$

x = 6

Jurus Super CEPAT

X = $\frac{18/18}{20/120}$

X = 6

Muf Firajullah