Theo đề bài ta có : nNa2CO3 = 0,2.0,05=0,01 (mol)
Ta có PTHH :
Na2CO3 + CaCl2 \(\rightarrow\) CaCO3\(\downarrow\) + 2NaCl
0,01mol......0,01mol.....0,01mol....0,01mol
Ta có : \(\left\{{}\begin{matrix}nNa2CO3=0,01\left(mol\right)\\nCaCl2=0,01\left(mol\right)\\nCaCO3=0,01\left(mol\right)\\nNaCl=0,02\left(mol\right)\end{matrix}\right.\) => \(\left\{{}\begin{matrix}mNa2CO3=0,01.106=1,06\left(g\right)\\mCaCl2=0,01.111=1,11\left(g\right)\\mCaCO3=0,01.100=1\left(g\right)\\mNaCl=0,02.58,5=1,17\left(g\right)\end{matrix}\right.\)