高中阶段有关化学生物不同试剂颜色反应特点

2025-02-12 17:07:46
推荐回答(2个)
回答1:

生物:
斐林试剂——砖红色沉淀
双缩脲试剂——紫色
苏丹三(我打不出罗马字母的3来,你知道怎么写就行)/IV——橘黄色/红色
甲基绿染液——绿色
吡罗红染液——红色
健那绿染液——绿色
溴麝香草酚蓝水溶液——由蓝变绿再变黄
重铬酸钾水溶液(检验酒精,有时候也在化学酸碱中和滴定时充当指示剂)——橙红色到灰绿色
龙胆紫、醋酸洋红、苯酚品红试液——红色
有些是染色的,有些是检验试剂,你应该不难分辨。
化学:
各种有色金属离子形成的盐溶液及沉淀
品红溶液(通SO2)——红色到无色
酚酞——遇碱变红
紫色石蕊溶液——遇酸变红、遇碱变蓝
蓝色/红色石蕊试纸——同上
甲基橙试液——pH值3.1之前为红色,3.1-4.4为橙色,4.4以后为黄色
无水硫酸铜——遇水变蓝
有色布条/纸片——遇Cl2等退色
KMnO4(H )——遇还原性物质退色 红色到无色
溴水——黄色到无色,可与溴反应使退色,也可萃取溴(如CCl4)使其退色。好了,大概就这些了吧

回答2:

还有二十多天高考的高三狗总结如下
高中常用试剂(太偏的没有,但我总结绝对是常考点)
甲基绿 检验 DNA 绿色
吡罗红 检验 RNA 红色
伊红美蓝 检验 大肠杆菌 黑色
斐林试剂 检验 还原糖 砖红色
双缩脲试剂 检验 蛋白质 紫色
苏丹Ⅲ 检验 脂肪 橘红色
苏丹Ⅴ 检验 脂肪 红色
溴麝香草酚蓝 检验 CO2 蓝绿黄(时间越短CO2浓度越高
淀粉溶液 检验 I2 蓝色
酚酞试液 检验 OH- 红色
甲基橙 检验 pH 红橙黄 (按pH由小到大)
石蕊试液 检验 pH 红紫蓝 (按pH由小到大)
无水CuSO4 检验 H2O 蓝色
澄清石灰水 检验 CO2/SO2 变浑浊
红色pH试纸 检验 OH- 蓝色
蓝色pH试纸 检验 H+ 红色
[Ag(NH3)2]OH 检验 醛基 银镜
KSCN溶液 检验 Fe3+ 血红色
K3[Fe3(CN)6]溶液 检验 Fe2+ 蓝色晶体
K4[Fe(CN)6]溶液 检验 Fe3+ 蓝色晶体
CH3CH2OH 检验 [Cu(NH3)4]2+ 深蓝色晶体
K2Cr2O7溶液 检验 CH3CH2OH 灰绿色
品红溶液 检验SO2 红色变无色

纯手工原创无污染

为了苏维埃的荣耀,还有疑问请提

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