货号:Whatman 精密/广泛pH试纸和显色剂2600-201A LITMUS PAPER BLUE 7MMx5M 1/RL 品牌:Whatman(Whatman(沃特曼),一家全球领先的高端实验室检测与分离技术公司,总部位于英国的美特斯通,目前隶属于通用电气(GE)医疗集团生命科学部。) 计量单位:包 所得积分:1 市场...
Indicators are substances that change color depending on the pH of the solution. 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 ...
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
2、What is the capital of Nepal?A, Kathmandu B, Pokhara C, Biratnagar D, Lalitpur 3、选择题：What is the main purpose of a clock?A) Measure weight B) Measure time C) Measure temperature D) Measure distance 4、选择题：What is the name of the famous American national park known for ...
假试卷 考试时间：80分钟（总分:120）A卷 考试人：___题号一二三四五总分 得分 一、综合题(共计100题)1、填空题：The ___ (历史的回响) can influence the present.2、听力题：The ___ is a constellation shaped like a hunter.3、选择题：What do we call a person who draws pictures?A. Illustra...
Why does phenolphthalein change color when going from an acid to a basic solution? A substance turns litmus paper blue. It is {Blank}.\A. an acid B. a base C. either an acid or a base Determine the compound as acid base salt or other. ...
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...
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
Notes SPI Acids and Bases Acids Litmus paper- is a common acid/base indicator blue litmus paper turns red in acids Fill in the blanks using the following words… red, hydronium, acids, compound, sour, An acid is any ___that increases the number of ___ions. Acids ...
The visual color change of rows one and two and the colour of litmus paper of row three gives the status of protein, carbohydrate and ammonium to the samples respectively. The observation is noted using USB camera feedback from the base station. Finally, the output of the three results is ...