What is a covalent bond?
A covalent bond in an intramolecular bond which occurs when a pair of electrons is shared between two elements, usually two non-metals. The electrons shared are in the outer shell of the atom of each element, which each atom contributing one electron to the shared pair, leaving both atoms with a complete outer shell. Covalent bonding can be represented with dot and cross diagrams and displayed formula. Examples of molecules with covalent bonds include H2O, CO2 and H2.
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11.25g of hydrated copper (II) sulfate is heated to constant mass. The new mass is found to be 7.19g. What is the formula of the hydrated copper (II) sulfate?
a) Complete the balanced symbol equations: (2 marks) H2SO4 + NaOH HCl + Mg(OH)2