In a chemical experiment, we need to measure the pH value of a liquid. If the pH value is less than 7, what kind of substance is it? A. Acid B. Base C. Neutral D. Salt 相关知识点: 试题来源: 解析 A。解析:在自然科学中,pH值小于7的物质是酸(acid)。pH值大于7的是碱(base),等于...
pHis a measure of the concentration of free hydrogen atoms in a solution. pH值是测试溶液中自由氢原子浓度的单位。 柯林斯例句 That man is a total phony, he palms himself off as aPh. d. 那家伙是个彻彻底底的冒牌货, 他冒称是个博士. ...
The InPro 3100i SG/120 is a combined pH/ORP electrode and temperature sensor designed for measurement in bioprocesses where clean-in-place (CIP) and sterilize-in-place (SIP) procedures are required. This is the 120 mm version of this rugged, gel-filled e
PH / ORP tester is one of the intelligent online chemical analysis equipment, is a widely used detect the pH, ORP value of the solution in chemical, petroleum, rubber, paper, tobacco, alcohol, sugar, food, mining, smelting, iron and steel, power generation, pharmaceu...
Although the measurement of pH buffer capacity (pHBC) is used to determine lime requirement and acid addition rate in acidification studies, the experimental conditions under which pHBC is determined have not been studied. The effect of valence and ionic strength on the measurement of pHBC was inve...
The Thermo Scientific Orion Lab Star PH111 pH/mV Bench Meter is ideally suited for laboratories with users of varying levels of technical expertise and who require a simple-to-calibrate and use meter for routine pH testing. See why they're the preferred choice for lab...
Optical detection of a quantal presynaptic membrane turnover. Exploration of the mechanisms and plasticity of has been hindered by the lack of a method to measure single vesicle turnover directly in individual presyna... TA Ryan,H Reuter,SJ Smith - 《Nature》 被引量: 738发表: 1997年 Kinetics...
A pH meter is an electronic device used for measuring the pH which is either the concentration of Hydrogen ions in an aqueous solution or the activity of the Hydrogen ions in an aqueous solution. The pH will indicate if the solution is acidic or basic, but is not a measure of acidity or...
The pH value measurement method for the national standard in China is based on the potentiometric method. This method involves using a pH meter equipped with a glass electrode and a reference electrode to measure the electromotive force(EMF) generated by the difference in hydrogen ion concentration...
A temperature device may be embedded into the pH sen-sor, or an external temperature device may be used.Change to read:INSTRUMENT REQUIREMENTS accuracy of the pH measurement system is described in the Calibration shall be at least 0.01 pH. The instrument shall be capable of temperature-...