英文字典中文字典Word104.com



中文字典辭典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z   


安裝中文字典英文字典辭典工具!

安裝中文字典英文字典辭典工具!








  • pH - Wikipedia
    In chemistry, pH ( p iː ˈ eɪ tʃ pee-AYCH), also referred to as acidity or basicity, historically denotes "potential of hydrogen" (or "power of hydrogen") [1] It is a logarithmic scale used to specify the acidity or basicity of aqueous solutions
  • PH | Definition, Uses, Facts | Britannica
    PH, quantitative measure of the acidity or basicity of aqueous or other liquid solutions The term, widely used in chemistry, biology, and agronomy, translates the values of the concentration of the hydrogen ion into numbers between 0 and 14 Learn more about pH
  • What Is pH? The pH Formula Equation - ChemTalk
    pH is a measure of how basic or acidic a substance is pH has a range of 0-14 A pH greater than 7 means the substance is basic A pH less than 7 means the substance is acidic
  • pH Scale: Definition, Chart, Values, Range - Chemistry Learner
    pH is a measure of how acidic or basic a substance is It takes a numerical value between 0 and 14 that measures the relative amount of free hydrogen and hydroxyl ions in water Water having more hydrogen ion concentration than hydroxyl is acidic
  • pH and Water | U. S. Geological Survey - USGS. gov
    pH is a measure of how acidic basic water is The range goes from 0 to 14, with 7 being neutral pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base The pH of water is a very important measurement concerning water quality
  • What Is pH and What Does It Measure? - ThoughtCo
    pH is a measure of how acidic or basic a solution is, from 0 to 14 pH is important for chemical reactions in areas like medicine, cooking, and agriculture Scientists use pH meters and indicators to measure the pH of solutions accurately
  • 15. 7: An Introduction to pH - Chemistry LibreTexts
    pH is defined as the negative log of hydrogen ion concentration It can be used to describe the relative acidity (or basicity) of a solution Because it is based on a logarithmic scale, a change in …
  • What Does PH Mean? | Understanding Acidity Levels
    pH measures the acidity or alkalinity of a solution Scale ranges from 0 (acidic) to 14 (alkaline) Neutral pH is exactly 7, indicating balance pH affects chemical reactions and biological processes Regular testing is crucial for soil and water health


















中文字典-英文字典  2005-2009

|中文姓名英譯,姓名翻譯 |简体中文英文字典