A. acid B. base C. salt D. water 相关知识点: 试题来源: 解析 B。原因:“For example, litmus paper can turn from red to blue in the presence of a base and from blue to red in the presence of an acid.”。 反馈 收藏
In the experiment, if a substance turns blue litmus paper red, it means the substance is ___. A. acidic B. basic C. neutral D. unknown 相关知识点: 试题来源: 解析 A。解析:在实验中,如果一种物质使蓝色石蕊试纸变红,这意味着该物质是酸性的。B 选项碱性物质会使红色石蕊试纸变蓝;C 选项中性...
In case of alkaline solution (PH>8.0), red litmus paper turns blue; In case of acid solution (PH<4.5), blue litmus paper turns red; The pH value of the solution is between 4.5-8.0, and the red litmus and blue litmus paper will not change color. ...
=.= It is alkaline or neutral. blue litmus paper changes red when it is acid. If it is alkaline or neutral it doesn't change colour at all. 2009-01-06 22:11:33 补充： so it isn't c is b. no alkaline or neutral for you to choose! 参考: me 我的名字is raymo...
Blue Litmus Paper When blue litmus paper is placed in a substance that is acidic, it will turn to red. However, if placed in a substance that is basic or neutral, it will remain blue. Blue litmus paper is meant to test only for an acidic pH level. ...
blue litmus paper 英[blu: ˈlɪtməs ˈpeipə] 美[blu ˈlɪtməs ˈpeɪpər] 释义 蓝石蕊试纸 实用场景例句 全部 Test: turns blue litmus paper red. 做个试验吧,能把蓝色的石蕊试纸变成红色. 互联网 They turn blue litmus paper red. 他们把蓝色石蕊试纸变红. 互联网 ...
Litmus paper blue 蓝色石蕊试纸 MACHEREY-NAGEL 91106 当条件从碱性变为酸性时,颜色从蓝色变为红色。石蕊试纸是已知的中和分析指示剂试纸。 技术数据: 产品类型:Litmus paper blue 产品编号:91106 测试项目:pH 检测限:pH 8.0-5.0 颜色变化:蓝色→红色
美 英 un.蓝石蕊试纸 英汉 un. 1. 蓝石蕊试纸
Blue litmus paper, pH value color change range: 8.0 (blue) ~ 4.5 (red)|蓝石蕊试纸, PH值变色范围:8.0(蓝色)~4.5(红色) 基本信息更多信息 中文名称:蓝石蕊试纸, PH值变色范围:8.0(蓝色)~4.5(红色) 中文同义词:蓝石蕊试纸, PH值变色范围:8.0(蓝色)~4.5(红色) ...
A. They turn litmus paper blue B. They have a bitter taste C. They react with metals to produce hydrogen gas D. They feel slippery 相关知识点: 试题来源: 解析 C。解析:酸与金属反应会产生氢气。选项A,使石蕊试纸变蓝是碱的性质。选项B,有苦味是碱的性质。选项D,感觉滑腻也是碱的性质。反馈...