litmus,litmus test- a coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions; used as a very rough acid-base indicator paper- a material made of cellulose pulp derived mainly from wood or rags or certain grasses ...
litmus paper n.unsized paper treated with litmus for use as an acid-base indicator 学习怎么用 双语例句 用作名词(n.) Litmus paper turns red in the presence of an acid. 石蕊试纸遇到酸就变红。 We test the liquid for acidity with a strip of litmus paper. ...
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
The substance that turns litmus paper red is___. A. an acid B. a base C. water D. salt 相关知识点: 试题来源: 解析 A。能使石蕊试纸变红的是酸。选项 B 碱使石蕊试纸变蓝;选项 C 水一般不会使石蕊试纸变色;选项 D 盐通常也不会使石蕊试纸变红。反馈...
The substance that turns litmus paper red is ___. A. acid B. base C. neutral solution D. salt solution 相关知识点: 试题来源: 解析 A。能使石蕊试纸变红的物质是酸。选项 B 是碱;选项 C 是中性溶液;选项 D 是盐溶液。只有酸能使石蕊变红。反馈...
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Litmus paper is handy as a generalacid-base indicator, but you can get much more specific results if you use an indicator that has a more narrow test range or that offers a wider color range. Red cabbage juice, for example, changes color in response to pH all the way from red (pH =...
base reactions. When an acid reacts with a base, it forms a salt and water. By using red litmus paper, chemists can confirm the presence of an acid in the reaction by observing the color change to blue. This simple test helps in the classification of different types of chemical reactions...
Litmus paper turns red in the presence of an acid.───石蕊试纸遇到酸就变红。 the form of a water solution or aslitmus paper, it is the oldest and most-used indicator of whether a substance is an acid or a Base.───的水溶液,或者做成石蕊纸后,是最古老和最常用的指示剂,可以指示一种...
The meaning of LITMUS is a coloring matter from lichens that turns red in acid solutions and blue in alkaline solutions and is used as an acid-base indicator.