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Because it changes color at the pK a of a mid strength acid, it is usually used in titration of strong acids in weak bases that reach the equivalence point at a pH of 3.1-4.4. [3] Unlike a universal indicator, methyl orange does not have a full spectrum of color change, but it has a sharp end point. In a solution becoming less acidic, methyl ...
Orange Pi 800: A keyboard computer that integrates an SBC with a keyboard and mouse. Orange Pi OS is a Debian-based operating system specifically developed for use with Orange Pi single-board computers. The OS includes various pre-installed applications for media playback, web browsing, and productivity tasks.
Purple haze refers to a state of mind induced by psychedelic drugs, particularly LSD. [86] Wearing purple is a military slang expression in the U.S., Canada and the U.K. for an officer who is serving in a joint assignment with another service, such as an Army officer on assignment to the Navy. The officer is symbolically putting aside his or ...
The Purple Heart (PH) is a United States military decoration awarded in the name of the president to those wounded or killed while serving, on or after 5 April 1917, with the U.S. military. With its forerunner, the Badge of Military Merit , which took the form of a heart made of purple cloth, the Purple Heart is the oldest military award still ...
During Apple's official unveiling of iPhone 4S on October 4, 2011, it was announced that Sprint would begin carrying the reconfigured CDMA iPhone 4 and iPhone 4S in the US on October 14. [ 81 ] [ 82 ] Cricket Wireless announced on May 31, 2012, that it would become the first prepaid carrier in the US to offer iPhone 4 and iPhone 4S, beginning ...
Anthocyanins may be used as pH indicators because their color changes with pH; they are red or pink in acidic solutions (pH < 7), purple in neutral solutions (pH ≈ 7), greenish-yellow in alkaline solutions (pH > 7), and colorless in very alkaline solutions, where the pigment is completely reduced. [57]
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