Acids have pH below 7 and are sour in taste. We can taste mild acids but strong acids are tested by indicators .acids turns blue litmus to red. Base have pH above 7 and are bitter in taste these have soapy texture. And base turns red litmus to blue. ...
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
Bases change the colors of indicators (litmus turns from red to blue) and they neutralize acids. Hence, bases are considered the chemical opposite of acids. Most common acid-base reactions take place in water solutions (commonly referred to as aqueous solutions ). One of the earliest ...
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. ...
It turns blue litmus red. It reacts with many metals (e.g., with zinc), releasing hydrogen gas, H2, and forming the sulfate of the metal. It reacts with most hydroxides and oxides, with some carbonates and sulfides, and with some salts. Since it is dibasic (i.e., it has two ...
(a) Mary was given a bottle of hydrochloric acid and a bottle of unknown colourless solution, liquid Y. She used red and blue litmus papers to test fo liquid Y. The results are as follows:colour of red litmus colour of blue litmus liquid Y turns blue remains blue(i) What is liquid ...
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...
In many ways, litmus paper is the perfect scientific sensor. It is cheap, requires no power or skill to use and yields instant results. Blue paper turns red in acids. Red paper turns blue in alkalis. And that is all you need to know. In the real world, though, things are a bit ...
acid- any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc. ...
Bases turn red litmus paper blue, have a bitter taste, and have a pH of greater than 7. Compare acid. 2. Mathematics a. The side or face of a geometric figure to which an altitude is or is thought to be drawn. The base can be, but is not always, the bottom part of the ...