[Hóa 11]

T

thanhnga96dcvn

A

anhtraj_no1


$Na_2O + H_2O \rightarrow 2NaOH$
0,04.....................0,08
$OH^- + HCO_3^- \rightarrow CO_3^{2-}$
0,08........................0,08
$Ca^{2+} + CO3^{2-} \rightarrow CaCO_3$
0,05...........................0,05
$Ba^{2+} + CO3^{2-} \rightarrow BaCO_3$
0,03...........................0,03

m kết tủa = 0,05.40 + 0,03.137 + 0,08.60 = 10,91

m = 460,91 - 10,91 = 450 g
 
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