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
Litmus paper blue 蓝色石蕊试纸 MACHEREY-NAGEL 91106 当条件从碱性变为酸性时,颜色从蓝色变为红色。石蕊试纸是已知的中和分析指示剂试纸。 技术数据: 产品类型:Litmus paper blue 产品编号:91106 测试项目:pH 检测限:pH 8.0-5.0 颜色变化:蓝色→红色
When red litmus paper is placed into a basic substance, it will turn blue. If it comes in contact with an acidic or neutral substance, it will remain red. Red litmus paper is meant to test only for an alkaline pH level. Common acids include include tartar sauce, corn, bacon and beer....
Click here:point_up_2:to get an answer to your question :writing_hand:in litmus paper test hcl gas turns moist litmus paper from blue to red as
Litmus paper turns red on contact with an acid.───石蕊试纸遇酸度会变红. Ammonia gas NH 3 is colorless which can turn wet redlitmus paperto blue.───氨气是无色的,它可把湿的红色石蕊试纸变成蓝色. Test: turns bluelitmus paperred.───做个试验吧,能把蓝色的石蕊试纸变成红色. ...
blue litmus paper 英[blu: ˈlɪtməs ˈpeipə] 美[blu ˈlɪtməs ˈpeɪpər] 释义 蓝石蕊试纸 实用场景例句 全部 Test: turns blue litmus paper red. 做个试验吧,能把蓝色的石蕊试纸变成红色. 互联网 They turn blue litmus paper red. 他们把蓝色石蕊试纸变红. 互联网 ...
Litmus paperturns red on contact with an acid. 石蕊试纸遇酸度会变红. 互联网 Test: turns bluelitmus paperred. 做个试验吧,能把蓝色的石蕊试纸变成红色. 互联网 They turn bluelitmus paperred. 他们把蓝色石蕊试纸变红. 互联网 Ammonia gas NH 3 is colorless which can turn wet redlitmus paperto blu...
8.Test: turns blue litmus paper red. 做个试验吧,能把蓝色的石蕊试纸变成红色. 9.They turn blue litmus paper red. 他们把蓝色石蕊试纸变红. 10.Ammonia gas NH 3 is colorless which can turn wet red litmus paper to blue. 氨气是无色的,它可把湿的红色石蕊试纸变成蓝色....
Litmus paper turns red in the presence of an acid. 石蕊试纸遇到酸就变红。 We test the liquid for acidity with a strip of litmus paper. 我们用一条石蕊试纸来试验这液体是不是酸性的。 权威例句 Managing organizational change Part 3 Implementation of information technology : from the laboratory to...
Litmuspaper can be used as an indicator of the presence of acid in a solution. 石蕊试纸可用以测试溶液是否含酸. 辞典例句 They turn bluelitmuspaper red. 他们把蓝色石蕊试纸变红. 期刊摘选 Ammonia gas NH 3 is colorless which can turn wet redlitmuspaper to blue. ...