Cambridge University Acid Base Chemistry and Oxides Question

1) Does not need long answers, can be short and simple

2) Does not have to be the correct answer, its only practice

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Are aqueous solutions containing oxide ions, O2‐, acidic, neutral or basic?
Write the formula of the product of the Lewis acid‐base reaction of boron trifluoride and
The hydrated cation Al3+(aq) is weakly acidic in water. Explain briefly why.
Al(H2O)63+(aq) + H2O(l) ⇌ Al(H2O)5OH2+(aq) + H3O+(aq)
(a) Show the structure of a silicate anion, containing 6 Si atoms, in which the silicate
tetrahedral, SiO4, shares two O atoms.
(b) Provide the silicate formula including the overall charge of the anion (Hint: double
check by looking at oxidation numbers of Si and O).
The perchlorate ion is an oxoanion containing Cl with oxidation number +7. Write the
formula for the perchlorate ion.
State whether the Cl atom in perchlorate ion can act as an oxidant, a reductant or both.
Typical oxidation numbers (Nox) for Group 17 elements are ‐1, 0, +1, +3, +5, +7. Identify
the Group 17 element which does NOT display this behaviour and explain briefly why not.
Give two reasons why the element fluorine is more reactive than the other halogens.
What is the maximum oxidation state of iodine, I?
Write the formula for an interhalogen containing chlorine and bromine for which the
oxidation number of chlorine is ‐1.

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