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
A. Turned red litmus paper blue. B. Turned blue litmus paper red. C. Did not change the color of either red or blue litmus paper. D. Made the litmus paper disappear. 相关知识点: 试题来源: 解析 C。解析:反应后,生成的溶液对红色或蓝色石蕊试纸都没有改变颜色。反馈...
It will turn red C. It will turn black D. It will not change color 相关知识点: 试题来源: 解析 B。解析:柠檬汁是酸性物质。石蕊试纸(litmus paper)遇酸性物质会变红,遇碱性物质会变蓝。因为柠檬汁是酸性的,所以石蕊试纸会变红,而不是变蓝、变黑或者不变色,所以A、C、D错误。
What color does acid turn litmus paper? What are the properties of ammonia? What is the conjugate base of HClO4? What produces hydronium ions in water? Why is it important for hydrogen bonds to be weak? Explore our homework questions and answers library ...
A. To make the solutions colorful. B. To test the acidity or basicity of the solutions. C. To add more substances to the reaction. D. To make the E. xperiment more F. un. 相关知识点: 试题来源: 解析 B。解析:在实验中,用石蕊试纸是为了测试溶液的酸性或碱性。反馈...
otherwise known as baking soda, has a lower pH level still, at around 8.4, but it is still alkaline because it is above the neutral pH value of 7. Other examples of substances that turn red litmus paper blue include sodium hydroxide (caustic soda), calcium hydroxide (limewater) and alkali...
What is an arrhenius base? What is the charge of a neutral object? What is a hydroxide ion? Which hydrogen in each molecule is most acidic? What is a normal ammonia level? What color does acid turn litmus paper? What is the overall charge of a nonpolar amino acid at a PH below its...
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...
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Blue Litmus Paper When blue litmus paper is placed in a substance that is acidic, it will turn to red. However, if placed in a substance that is basic or neutral, it will remain blue. Blue litmus paper is meant to test only for an acidic pH level. ...