Which classification is correct? A. Alkali metal: rubidium; transition element: platinum; halogen: xenon; noble gas: bromine B. Alkali metal: rubidium; transition element: platinum; halogen: bromine; noble gas: xenon C. Alkali metal: platinum; transition…
Which oxide will react with water to produce the most basic solution? A. Potassium oxide B. Calcium oxide C. Sulfur trioxide D. Nitrogen dioxide
The table shows the observed colour of three octahedral complex ions formed by the same metal ion, , with different ligands. Complex ion Colour of complex green blue yellow Which statement…
Portions of the rinse water were then titrated with the standardized EDTA solution in the presence of murexide as indicator. The burette readings are given in the table. Trial 1 Trial 2 Trial 3 Trial 4 Final burette reading / (± 0.05…
The cyanide ion acts as a ligand in many complex ions, for example hexacyanoferrate(III), . (i) State the type of bond, as precisely as possible, that joins each cyanide ion to the iron ion. (ii) Deduce the oxidation state of iron in…
Each indicator contains more than one benzene ring. (i) State one functional group, other than the phenyl group, that is present in all three indicators. (ii) Deduce the colour of light absorbed by bromothymol blue in acidic conditions and by bromophenol blue…
Gallium was discovered in 1875 from its atomic emission spectrum, which contains two strong violet lines. (i) State which feature of an emission spectrum allows the ionization energy of the element to be determined. (ii) Using sections 1, 2 and 9 of the data…
Draw a line of best fit on the graph, extrapolating it beyond the range of the data.
State, in mathematical terms, how the absorbance of these solutions depends on their concentration.
The colorimeter can record either absorbance or percentage transmittance at a chosen wavelength. Outline why one particular wavelength has to be selected.