Metal-phthalein

Mercury, tris(l,10-phenanthroline)-structure, 64 Mercury(II) complexes masking agent, 536 Mercury electrodes potential range aqueous solution, 480 Metal carbonyls structure, 16 Metallocenes nomenclature, 126,127 Metallochromic indicators, 554 Metallofluorescent indicators, 558 Metallothionein proteins, 142 Mettd-metal bonding, 137,169 gravimetry, 525 history, 21,23 nomenclature, 122, 123 Metal nitrosyls structure, 16 Metal-phthalein metallochromic indicator, 557 Metal template reactions, 416,433 equilibrium kinetic, 434 thermodynamic, 434 Methane, dichloro-... 

Oxo-I 3H)- isobenzofuranylidene)bis[(6-hydroxy-5-methyl 3,I-phenylene)methylene]]bis[ -(carboxymethyl) glycine],9CI. 3,3 -Bis[N,l di(carboxymethyl)aminomethyl]-o-cresolphthalein. Phthalein complexone. Metal phthalein. 0-Cresolphthalein complexone. Phthalein purple [2411-89-4]... 

Bromopyrogallol red. This metal ion indicator is dibromopyrogallol sulphon-phthalein and is resistant to oxidation it also possesses acid-base indicator properties. The indicator is coloured orange-yellow in strongly acidic solution, claret red in nearly neutral solution, and violet to blue in basic solution. The dyestuff forms coloured complexes with many cations. It is valuable for the determination, for example, of bismuth (pH = 2-3. nitric acid solution endpoint blue to claret red). 

M. D. Alexander, "Reactions of the Alkali Metals with Water A Novel Demonstration/ J. Chem. Educ., Vol. 69,1992,418. The reaction of sodium metal with water to produce an aqueous solution of sodium hydroxide and hydrogen gas is performed at the interface between paint thinner and the more dense water. Periodically, bubbles of hydrogen gas carry the sodium metal into the organic layer, temporarily stopping the reaction. The presence of the aqueous layer is shown by a phenol-phthalein indicator color change. 

Sodium metal flits around the water surface as it reacts briskly, giving off hydrogen gas.The other product is sodium hydroxide, which changes a substance added to the water (phenol-phthalein) from colorless to pink. 

Most Arrhenius bases are metals from Groups lA (1) and 2A (2), such as NaOH, KOH, LiOH, and Ca (OH) 2. The hydroxide ions (OH ) give Arrhenius bases common characteristics, such as a bitter taste and a slippery feel. A base turns litmus indicator blue and phenol-phthalein indicator pink. Table 14.3 compares some characteristics of acids and bases. 

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