一、判断氧化剂、还原剂、氧化产物及还原产物要点关键是全面、准确地理解氧化还原反应的概念。看反应物中元素化合价发生变化的情况:化合价升高,失电子,该物质为还原剂;化合价降低,得电子,该物质为氧化剂。例1NaH是一种离子化合物,它跟水反应的方程式为:NaH+H2O=NaOH+H2↑,它 First, determine the oxidants, reducing agents, oxidation products and reduction products key point is to comprehensively and accurately understand the concept of redox reactions. Look at the situation where the elemental valence of the reactants changes: the valence rises and the electrons are lost. The substance is a reducing agent; the valence is reduced, and the electrons are obtained, and the substance is an oxidant. Example 1 NaH is an ionic compound. Its equation for reacting with water is: NaH+H2O=NaOH+H2↑, which