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...
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...
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
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。
百度试题 结果1 题目Before the reaction, what color did the acid solution turn blue litmus paper? A. Blue. B. Red. C. Green. D. Yellow. 相关知识点: 试题来源: 解析 B。解析:实验前,酸性溶液使蓝色石蕊试纸变红。反馈 收藏
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
A. Tastes sweet B. Turns litmus paper blue C. Reacts with metals to produce hydrogen gas D. Has no E. ffect on indicators 相关知识点: 试题来源: 解析 C。本题考查酸的性质。酸尝起来是酸的,不是甜的,A 错误;酸能使石蕊试纸变红,不是变蓝,B 错误;酸能和金属反应产生氢气,C 正确;酸对指...
The impregnated carrier is freeze-dried, impregnated with a solution produced by dissolving a tetrazolium salt in a nonaqueous solvent (e.g. metha nol), and quickly dried usually by freeze-drying to obtain the objective test paper. The test paper has the above characteristics and furthermore, ...
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 strips in total) View more ...
3. Testing with Blue Litmus Paper: When blue litmus paper is dipped into an acidic solution, it undergoes a color change. Specifically, if the solution is acidic, the blue litmus paper will turn red. 4. Conclusion: Since sulphurous acid is acidic, when blue litmus paper is tested with it...