[hoá 10]trộn dung dịch

C

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[TEX]x \ la \ d \ sau \ pu[/TEX]

[TEX]10 \ ml \ HCl ...1.15.......................................1.15-x[/TEX]


[TEX]...........................................x[/TEX]


[TEX]10 \ ml \ HCl ...1.05...................................x-1.05[/TEX]


[TEX]\frac{1,15 - x}{ x - 1,05} = 1[/TEX]


--> [TEX]x = 1,1[/TEX]


[TEX]m = 1,1 .(10+10) = 22[/TEX]
 
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