pH = -log[H+] where log is the base-10 logarithm and [H+] stands for the hydrogen ion concentration in units of moles per liter solution. The term "pH" comes from the German word "potenz," which means "power," combined with H, the element symbol for hydrogen, so pH is an abbrev...
This means these quantities must both equal 10-7 M. If we put [H+] = 10-7 M into the equation for pH: pH = -log10[H+] we get pH = 7 for neutrality. Acid and Base pH Acid solutions have pH < 7. pH values lower than 0 are possible. Basic solutions have pH > 7. pH ...
PH is a property that can be measured in many ways. Most of us remember the red and blue litmus paper we used in chemistry class. If red litmus paper turned blue, the material was basic –– if blue litmus paper turned red, it was an acid. Certainly, there were techniques that would...
- 《Journal of Agricultural & Food Chemistry》 被引量: 116发表: 2005年 Study of gelatinization process and viscoelastic properties of cassava starch: Effect of sodium hydroxide and ethylene glycol diacrylate as cross-linking a... The gelatinization of cassava starch was studied by means of ...
Environmental pH is a critical parameter for innumerable chemical reactions, myriad biological processes and all forms of life. The mechanisms that underlie the perception of external pH (pHe) have been elucidated in detail for bacteria, fungi and mammalian cells; however, little information is availa...
The adsorption and decomposition of PH3on Si(111)‐(7×7) was investigated in ultrahigh vacuum by means of temperature programmed desorption, low‐energy electron diffraction, Auger electron spectroscopy (AES), and electron stimulated desorption (ESD) methods. Phosphine adsorbs on Si(111)‐(7×7...
Precipitation and precipitate transformation in the system sodium phosphate (pre-adjusted to pH 7.4)鈥攃alcium chloride (25掳)was studied by means of radio... R. Despotović,N. Filipović-VincekovićH. Füredi-Milhofer - 《Calcified Tissue International》 被引量: 140发表: 1975年 Calcium ph...
Preconcentration by means of pH-stacking occurs upon introduction of the sample into the capillary at the pH junction, resulting in a fast and efficient separation analysis of steroids. Using the developed method the separation of eight targeted steroids, that include 伪,尾-dihydroxyprogesterone, ...
A new type of cellulose derivative was synthesized by means of conjugating cysteamine to hydroxypropyl cellulose (HPC) and the degree of thiol groups could... J Tan,H Kang,R Liu,... - 《Polymer Chemistry》 被引量: 43发表: 2011年 Charge-conversional and reduction-sensitive poly(vinyl alcohol...
DM Kurtz - 《Jbic Journal of Biological Inorganic Chemistry》 被引量: 302发表: 1997年 Reactivity in polynuclear transition metal chemistry as a means to obtain high-spin molecules: substitution of 4-OH– by η1,4-N3– increases nine times the ground-state S value of a nonanuclear nickel(i...