kim loại nhóm 1A 2A

S

soccan

giả sử $m=36,5g$
$Na+HCl \longrightarrow NaCl+\dfrac{1}{2}H_2\\
Mg+2HCl \longrightarrow MgCl_2+H_2\\
Na+H_2O \longrightarrow NaOH+\dfrac{1}{2}H_2\\
n_{H_2O}=\dfrac{36,5-0,365a}{18}$
ta có

$\dfrac{0,365a}{36,5.2}+\dfrac{36,5-0,365a}{36}=0,9125\\
\longrightarrow a=19,73$
 
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