A:碳酸氢铵溶液中加入过量氢氧化钠溶液:NH4++HCO3-+2OH-=CO32-+NH3•H2O+H2O
B:稀硫酸与氢氧化钡溶液恰好中和:Ba2+ +OH- +H+ +SO42- =BaSO4↓+ H2O
C:向硅酸钠的溶液中滴加稀盐酸:Na2SiO3+2H+=H2SiO3↓+2Na+
D:氯气与水反应:Cl2 + H2O =2H+ +Cl- + ClO-
秦岭—淮河一线是我国一条重要的地理分界线,下列叙述正确的是 ( )
Spring is a beautiful____ of a year. It's from March to ____. A lot of flowers come out. The weather is windy and ____. Spring is the best time to ____trees. I like spring best. ____my birthday is in April. It's on ____18th . 1 usually have a party ____that day.