一些化學問題

1)AgNO3(aq) + NaCl(aq) --> AgCl(s) + NaNO3(aq)
precipitation reaction
AgCl is insoluble in water and thus forms solid in aqueous solution
observation: white ppt is formed immediately

2)BaCl2(aq) + Na2SO4(aq) --> BaSO4(aq) + 2NaCl(aq)
again precipitation reaction
BaSO4 is precipitated to form white solid

both salt is insoluble in water.

請問
(1) 硝酸銀溶液+氯化鈉溶液

AgNO3 + NaCl ------> AgCl + NaNO3

(2) 氯化鋇溶液 +硫酸鈉溶液

BaCl2 + Na2SO4 -----> BaSO4 + 2NaCl

它們的方程式是什麼? 屬什麼反應? 鹽的性質是什麼?

置換反應生出不溶鹽