A. paper B. pen C. ruler D. test tube 相关知识点: 试题来源: 解析 A。选项 B“pen”是笔,不能用来测试物质酸碱性;选项 C“ruler”是尺子,也不行;选项 D“test tube”是试管,是容器不是测试酸碱性的工具。而“paper”可以是 pH 试纸,用来测试物质酸碱性。反馈 收藏 ...
For testing if a substance is acidic or basic, which tool do we use, pH test paper or a thermometer? A. pH test paper B. Thermometer C. Both D. Neither 相关知识点: 试题来源: 解析 A。解析:pH 试纸用于检测物质的酸碱性,温度计用于测量温度。选项 B 温度计不能检测酸碱性;选项 C 两者不...
The solution whose pH value is below 7 will be acidic and those which is above 7 will be basic. Solutions having value 7 will be neutral.Answer and Explanation: A substance is considered to be an acid, if its reading in the pH scale is below 7. In can be also defined as the ...
The solution is considered acidic when the hydrogen ion concentration is greater than the hydroxide ion concentration. For convenience, we can use the...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can ...
acid dissociation constant - Ka- a quantitative measure of how strong an acid is. acidic solution- an aqueous solution with a pH less than 7.0. actinides- Usually, the actinides are considered to be elements 90 (thorium) through 103 (lawrencium). Otherwise, the actinides are defined accord...
Used as herbal substance powdered or as preparation (capsules, dry extract), or topically as compresses. Venotonic, anti-platelet, anti-inflammatory activity. Anti-oxidant properties through inhibition of the peroxidation and some enzymes activity (β-glucuronidase, elastase, collagenase, hyaluronidase,...
A food additive (additional substance) is any substance that is not a food in itself or an ingredient in food, but when added to a product for processing purposes, it becomes part of the food [5]. The following are not considered to be food additives: ingredients in food or chemicals to...
damages to mitochondrial function are important indicators of drug-mediated liver, cardiac and neurological disfunctions. Therefore, the integration of this test into the toxicology studies would allow a better evaluation of the drug side effects and improve the chemical substance synthesis upstream the ...
This largely depends on the number of hydrogen ions that the substance contains. The lower on the scale that a substance is, the more acidic it is, and the higher it is, the more basic. Anything that is right in the middle is considered a neutralizer. An example of this would be ...
A solution has a high hydroxide ion concentration and a low hydrogen ion concentration. What type of solution is this? a. neutral solution b. acidic solution c. basic solution d. buffer solution A chemical substance that results from the combination of two or more atoms is called?