Cho 100g dd Na2CO3 16,96%, tác dụng với 200g dd BaCl2 10,4%. Sau phản ứng, lọc bỏ kết tủa được dd A. Tính nồng độ % các chất tan trong dd A

Not a  mixture of two common elements that can be separated by physical means.

Answer is: the equilibrium  shifts toward the reactants, to the left side of chemical reaction.it is because lead(ii) nitrate dissociates in water: pb(no₃)₂ → pb²⁺(aq) + 2no₃⁻(aq).according to lechatelier's principle, the position of equilibrium moves to counteract thechange (more lead cations, common ion), the position of equilibrium will move so that the concentration ofproducts decrease and concentration of reactants of chemical reaction increase.read more on -