五、科技英语题(共1题,6分。 )27.(6分)How to know whether an unknown is an acid or abase? One common way is to wet litmus paper with it. Acids turn litmus paper red, while bases turn litmus paper blue. A neutral chemical won't change the paper's color.While you have no litmus ...
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 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. Package Included 2 x boxes (200 str...
CONSTITUTION:(A) A carrier of a macromolecular material such as filter paper, nonwoven fabrics, or membrane filter of natural or synthetic fibers (such as a cellulose acetate membrane having 0.1-0.4mu pore diameter) is allowed to support, on the same point, (B) a reagent composition ...
Specifications: Material: High-quality Litmus Paper Range: PH 0-14 Design: Universal Indicator Paper with distinct color scale Usage: Quick and easy testing for alkaline or acid levels in liquids Size: Approximately 5 meters in length Accuracy: Provides reliable and accurate pH readings Features: ...
Acidsalso have a sour taste, such as the acid found in lemons. A final quality that allacidsshare is that when they come into contact withlitmus paper, they will turn the paper red. Acidsare all around us and are used for a wide variety of purposes. Some common acids you can find in...
Acid definition: a compound usually having a sour taste and capable of neutralizing alkalis and reddening blue litmus paper, containing hydrogen that can be replaced by a metal or an electropositive group to form a salt, or containing an atom that can ac
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...
网络释义 1. 石蕊试纸遇酸度会变红 odict.net|基于13个网页 2. 作家要接触真实的生活 www.haodic.com|基于 1 个网页 例句 释义: 全部,石蕊试纸遇酸度会变红,作家要接触真实的生活 更多例句筛选 1. Litmuspaperturnsredoncontactwithanacid. 石蕊试纸接触到酸性时会。
Step-by-Step Solution:1. Understanding Litmus Paper: Litmus paper is a natural indicator used to test the acidity or basicity of a solution. It comes in two colors: blue and red. Blue litmus paper is used to te