\(n C a C O 3 = 10 100 = 0 , 1 ( m o l ) P T H H : C a C O 3 + 2 H C l → C a C l 2 + C O 2 ↑ + H 2 O ⇒ n H C l = 2 n C a C O 3 = 0 , 2 ( m o l ) ⇒ m H C l = 0 , 2 ⋅ 36 , 5 = 7 , 3 ( g )\)
Ta có: \(n_{CaCO_3}=\dfrac{10}{100}=0,1\left(mol\right)\)
\(PTHH:CaCO_3+2HCl--->CaCl_2+CO_2+H_2O\)
Theo PT: \(n_{HCl}=2.n_{CaCO_3}=2.0,1=0,2\left(mol\right)\)
\(\Rightarrow m_{HCl}=0,2.36,5=7,3\left(g\right)\)