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. 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...
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。
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...
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 ...
Acids are species that can donate hydrogen ions in an aqueous solution. They are of two types: organic and inorganic acids. Acids turn blue litmus paper red and have a pH lower than 7. Answer and Explanation: Learn more about this topic: ...
They’ve always been good friends, but the acid test will come when they have to share a flat.Both these expressions originally referred to chemical tests. The acid test uses nitric acid to test if something is made of gold. The litmus test uses litmus paper to test for acids and ...
But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It’s hard to get a clear result. Will there be a better indicator than litmus paper? The three kids decided to try and find out!How? They went to ...
Aqueous acids have a pH of less than 7, where an acid of lower pH is typically stronger, and turn blue litmus paper red. Chemicals or substances having the property of an acid are said to be acidic. Common examples of acids include acetic acid (in vinegar), sulfuric acid (used in car...