(Concept 3.3) A buffer causes acidic solutions to become alkaline, and alkaline solutions to become acidic. A buffer stabilizes the pH of a solution by preventing acids or bases from dissociating. A buffer accepts hydrogen ions when they are in excess and donates hydrogen ions when they have been depleted.
Ivan IV, The Terrible, was crowned Russia's first Tsar at the age of 17. Ivan the Terrible was the fallen angel. He set up a bodyguard that has been described as Russia's first 'secret police' - the Oprichniki - as a religious brotherhood sworn to protecting God's Tsar.
The Tsardom of Russia, also known as the Tsardom of Muscovy, was the name of the centralized Russian state from assumption of the title of Tsar by Ivan IV in 1547 until the foundation of the Russian Empire by Peter the Great in 1721. From 1551 to 1700, Russia grew 35,000 km2 per year. The period includes the upheavals of the transition from the Rurik to the Romanov dynasties, many wars with the PolishâLithuanian Commonwealth, Sweden and Ottoman Empire as well as the Russian conquest of ...