下列离子方程式正确的是
| A．向次氯酸钙溶液中通入过量CO2：Ca2++2ClO—+H2O+CO2=CaCO3↓+2HClO |
| B．Fe(OH)3溶于氢碘酸：Fe(OH)3＋3H＋===Fe3＋＋3H2O |
| C．用FeCl3溶液腐蚀铜线路板：Cu + Fe3+＝ Cu2+ + Fe2+ |
| D．含等物质的量的NaHCO3和Ba(OH)2溶液混合： HCO＋OH－＋Ba2+ ===BaCO3↓＋H2O |
相关试题
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
Progress______ so far very good and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
Charles was alone at home, with_______ looking after him.
| A．someone | B．anyone | C．not one | D．no one |
It is often ______ that human beings are naturally equipped to speak.
| A．said | B．to say | C．saying | D．being said |
粤公网安备 44130202000953号