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Define the term Covalent Bond

A covalent bond is formed by a shared pair of electrons between two atoms.

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What transformations occur when turning limestone to quicklime then to slaked lime?

Calcium carbonate (limestone) is decomposed in order to form calcium oxide (quicklime) and carbon dioxide. The quicklime is then treated with water in order to give calcium hydroxide (slaked lime).

Answered by Sabina F. • Chemistry tutor

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Give the reagents required for the nitration of toluene (methylbenzene) to 2,4,6-trinitrotoluene and provide a mechanism.

The reagents needed are sulphuric acid and nitric acid. It may be useful to notice that nitric acid here acts as a stoichiometric reagent, in that it is used up in the reaction to nitrate the toluene, but...

Answered by Alex A. • Chemistry tutor

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What is the difference between a reversible reactions which occurs in a closed system and an open system?

An Open System is one in which one or more of the reactants or products are able to escape from the container. A Closed System is one in which neither the reactants or the products can escape from the co...

Answered by Kawthar H. • Chemistry tutor

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What is ionic and covalent bonding?

Ionic bonding occurs when a metal and non-metal react together. It involves the metal atom losing electrons from its outer shell to become a positive ion (as there are more positive protons in the nucleus...

Answered by Suraiyya J. • Chemistry tutor

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