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...
Background: As the properties of acids and bases have been observed and particle concepts developed, there has been a change in the definitions of an acid and base. The original definitions were based on observable properties, such as an acid tastes sour, or an acid turns litmus red. More ...
The meaning of ACID is a sour substance; specifically : any of various typically water-soluble and sour compounds that in solution are capable of reacting with a base to form a salt, redden litmus, and have a pH less than 7, that are hydrogen-containing
For example, litmus paper turns red in acidic solutions and blue in basic solutions. When an acid is neutralized by a base, the litmus paper will change from red to blue or vice versa, depending on the starting pH. 1. What is the general equation for acid-base neutralization reaction?
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
An acid reacts with a metal to form a salt, neutralizes bases, and turns litmus paper red.2. A substance that can accept a pair of electrons; a Lewis acid. SEE: alkali; SEE: base; SEE: indicator; SEE: Lewis acid; SEE: pH3. A sour substance. 4. Slang term for lysergic acid ...
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...
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 bromophenol blue,bromphenol blue,tetrabromo-phenolsulfonephthalein- a dye used as an acid-base indicator ...
The meaning of ACID is a sour substance; specifically : any of various typically water-soluble and sour compounds that in solution are capable of reacting with a base to form a salt, redden litmus, and have a pH less than 7, that are hydrogen-containing