百度试题 结果1 题目What PH is acid rain solution? ( ) A. more than 5.6 B. less than 5.6 C. more than 6.5 D. less than 7 相关知识点: 试题来源: 解析 B 反馈 收藏
What acidic and basic substances do humans encounter in their everyday activities? Explain why you cannot test the effects of two parameters (like pH and temperature) simultaneously in the same experiment. What is meant by the term "gram-variable"?
Many people are aware that pH has something to do with acids or bases and that it is important for things like water quality, food-making, aquatic life and plants, but not many really understand what it means. In simplest terms, a pH value indicates how acidic or basic water is. A pH...
How to identify Lewis acids and Lewis bases? What do all alkaline earth metals have in common? How do you determine if a compound is amphoteric? What are three pH neutral aqueous compounds? Is salt acidic or basic? What are amphoteric oxides?
“In the field of chemistry, pH is an important concept. What does pH stand for?” A. Potential of Hydrogen B. Power of Hydrogen C. Property of Hydrogen D. Proportion of Hydrogen 相关知识点: 试题来源: 解析 A。pH 是 Potential of Hydrogen 的缩写,意为“氢的电位”。选项 B“Power of ...
2化学的base and acid的几道题1.A table wine has a pH of 3.40.What is the hydronium ion concentration of thewine?2.A 2.5 x 10-3 M solution of an acid HA has a pH of 3.80 at 25°C.What is thehydronium ion concentration of the solution?Calculate Ka for the acid.3.The ionisatio...
The article discusses the concept of power of hydrogen (pH). It defines pH as a measure of the acidity or alkalinity of solutions, providing levels which will determine whether conditions are acidic, neutral or basic (alkaline). It discusses the application of pH levels to achieve optimal ...
What is pH? The pH scale measures the acidity of a substance. It ranges from 0 to 14, with 0 being the most acidic, 7 being neutral, and 14 being the most basic. For example, battery acid has a pH of 0, water has a pH of 7, and drain cleaner has a pH of 14. ...
pH describes how acidic or basic a solution is. Whether an aqueous solution reacts as an acid or a base depends on its hydrogen ion (H+) content. In fact, the term "pH" originates from Latin and is an acronym for "potentia hydrogenii" - the power of hydrogen....
A. To make the solutions colorful. B. To identify acidic and basic solutions. C. To react with water. D. To change the pH of the solutions. 相关知识点: 试题来源: 解析 B。中文解析:在实验中,酸碱指示剂的作用是通过颜色变化来识别溶液是酸性还是碱性。A 选项让溶液变得多彩不是主要作用;C 选...