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The electronegativity is the tendency of an atom to attract electrons towards itself in a covalent bond.
The electronegativity of the halogens decreases down the group as the radius of each atom in...
A3. Ethanoic acid is a weak acid with the formula CH3COOH. It will dissociate into H+ and CH3COO- therefore the expression for Ka is [H+][CH3COO-]/[CH3COOH] The [H+] = [CH3COO-] and so the expression ...
A2. First thing to work out is the moles of NaOH added, since moles = concentration x volume, = 0.0108 mol/dm^3 x 50ml, but need volume to be in units of Litres to match with the units of dm^3 so the fo...
A1. First it is important to know that nitric acid (HNO3) is a strong acid and so [HNO3] = [H+] Beaker A contains 100cm^3 = 100ml Final volume is 150ml (50cm^3 of distilled water is added to beaker...
Na2O + 2HCl --> 2NaCl + H2O, easiest way to do this is to balance this equation is to write down all the atoms on both sides of the reaction. Its easiest to start with an element ...
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