In 1952 the official birthday of the new monarch, Queen Elizabeth II was celebrated in June in Canada as it was in the United Kingdom. But the next year it was moved to the Monday immediately preceding 25th May and Victoria Day was also moved from 24th May to that Monday.n 1952 the official birthday of the new monarch, Queen Elizabeth II was celebrated in June in Canada as it was in the United Kingdom. But the next year it was moved to the Monday immediately preceding 25th May and Victoria Day was also moved from 24th May to that Monday.
The production of calcium oxide from limestone is one of the oldest chemical transformations produced by man. Its use predates recorded history. Most ancient languages have a word for calcium oxide. In Latin it is calx, from which the name of the element calcium is taken.In Old English, its name is l m, which is the origin of the modern commercial name for calcium oxide, namely lime.aCO 3 (s). CaO(s) + CO 2 (g). This reaction is reversible; calcium oxide will react with carbon dioxide to form calcium carbonate. The reaction is driven to the right by flushing carbon dioxide from the mixture as it is released.
People have used calciumâs compounds for thousands of years â in cement, for example. Limestone [calcium carbonate] was called calx by the Romans. The Romans heated calx, driving off carbon dioxide to leave calcium oxide.To make cement, all you have to do is mix calcium oxide with water.The Romans built vast amphitheaters and aqueducts using calcium oxide cement to bond stones together. (1). Despite the long history of calciumâs compounds, the element itself was not discovered until electricity was available for use in experiments.alcium is used to remove oxygen, sulfur and carbon from alloys. Calcium from limestone is a vital component of Portland cement. Quicklime (CaO) is used in many applications in the chemical industry, such as treatment of drinking water â especially for water softening and arsenic removal, animal waste and wastewater.