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铁锈蚀的实验是初中化学教材中重要的探究实验,也是中考命题的一大热点.铁锈蚀的实验除考查铁生锈的条件外,还重点考查铁锈蚀速率的比较判断、防锈措施这些亮点,同时还考查同学们对酸碱盐等对铁锈蚀的影响以及用控制变量法探究铁锈蚀的因素的能力.一、铁锈蚀条件的探究例1(2014年黑龙江省龙东地区中考题)世界每年因腐蚀而报废的金属设备和材料相当于年产量的20%~40%,为探究铁锈蚀条件,某同学设计的实验如图1所示,一周后观察到
Rust corrosion experiment is an important junior high school chemistry textbook exploration experiment, is also a hot topic in the test.The rust corrosion test in addition to checking the iron rust conditions, but also focus on iron corrosion rate comparison judgment, rust prevention measures these highlights , But also examine the students on acid and alkali corrosion of iron and other effects of corrosion and the use of controlled variable method to explore the factors of iron corrosion ability.A rust corrosion conditions of Example 1 (2014 Longdong Heilongjiang Province exam questions) the world Every year due to corrosion and scrap metal equipment and materials equivalent to 20% to 40% of annual output, in order to explore iron corrosion conditions, a class of students designed experiment shown in Figure 1, observed after a week