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What is a ligand?

A species with one or more valence electron pairs that forms co-ordinate bonds with a metal ion.
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Answered by Umamah Y. • Chemistry tutor
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Hydrogen bromide forms a strong acid when dissolved in water whereas hydrogen fluoride forms a weak acid. Distinguish between the terms strong acid and weak acid. State equations to describe the dissociation of each acid in aqueous solution. [3]

Here, we have to focus on the term strong acid. It is defined as an acid that is dissolved completely in an aqueous solution. We say that the reaction of dissociation of the acid goes to completion, and we w...
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Answered by Juraj O. • Chemistry tutor
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What is the relative formula mass of sodium chloride?

58.5 Relative formula mass (M r ) is found by adding together the relative atomic masses (A r ) of all the atoms present in a compound. Sodium Chloride is NaCl. The relative atomic masses can be found in the...
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Answered by Jenny S. • Chemistry tutor
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Providing reasoning, what is the trend in the atomic radius of row 3 elements across the periodic table?

Decreasing atomic radius across the periodic table. - greater number of protons in the nucleus resulting in a greater nuclear charge. - little/no change in shielding. - electrons added to same shell. - overa...
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Answered by Jenny S. • Chemistry tutor
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Why are alkanes saturated and alkenes unsaturated?

Alkanes are saturated because they contain only single covalent bonds. Alkenes are unsaturated because they do have double covalent bonds.
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Answered by Calum M. • Chemistry tutor
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