论文部分内容阅读
一、离子方程式书写的基本规律及要求(1)合事实:离子反应要符合客观事实,不可臆造产物及反应.(2)式正确:化学式与离子符号使用正确合理.(3)号实际:“=”“(?)”“→”“↑”“↓”等符号符合实际.(4)两守恒:两边原子数、电荷数必须守恒(氧化还原反应离子方程式中氧化剂得电子总数与还原剂失电子总数要相等).(5)明类型:分清类型,注意少量、过量等.
First, the basic laws and requirements of ion equation writing (1) Fact: The ion reaction must meet the objective facts, can not be fabricated products and reactions. (2) The formula is correct: the use of chemical formulas and ion symbols is correct and reasonable. (3) Actual: “ ”“ ”(?)“ ”→“ ”↑“ ”↓" and other symbols conform to reality. (4) Two conservations: The number of atoms and charges on both sides must be conserved (The total number of electrons and the reducing agent in the oxidant-reduction ion equation The total number of electrons should be equal.) (5) Ming type: distinguish type, pay attention to a small amount, excessive and so on.