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Electronegativity is the measure of the tendacy/ability of an atom to withdraw electron density in a chemical bonding pair of elcectrons. It is most commonly measured using the pauling scale.

Firstly, I would ask the student what they understand about Le Chateliers Principle. "If a system is at equilibrium and a change is made to the conditions, then the system responds to counteract the ...

The metals of group 1 (like potassium) can be identified by a flame test: A sample of the metal is placed in a bunsen flame, and the colour of the flame tells the metal. 

Potassium placed in the fl...

This is because in liquid state water molecules are close to each other, but in an disorganised manner. Each water molecule forms around 3.4 hydrogen bonds with other water molecules. 

However, in ...

32 mmol = 0.032 mol

75cm³ = 0.075dm³

n = c x v    so   c = n / v

c = 0.032mol/0.075 dm³ = 0.426moldm^-3

pH = -log[H+]

pH = -lo...