Group 7 Flashcards
What elements are in group 7
fluorine, chlorine, bromine, iodine and astatine
What is the trend in boiling points down group 7
increase because of the increase in van der Waals forces
What is the trend in electronegativity down group 7
decrease as the atomic radii and the number of electron shells increases
How do halogens react with electrons
readily accept them and are strong oxidising agents
What is the trend in oxidising power moving down the group
decreases
Which ions can reduce concentrated sulfuric acid
bromide and iodide
What is the trend in reducing power moving down the group
increases
what can acidified silver nitrate solution be used for
to identify aqueous halide ions
What are the properties of fluoride ions
soluble and do not produce a precipitate
What are the properties of chloride ions
produce a white precipitate of silver chloride, which dissolves in dilute ammonia
What are the properties of bromide ions
Produce a cream precipitate of silver bromide, which is sparingly soluble in dilute ammonia, but soluble in concentrated ammonia
What are the properties of iodide ions
Produce a yellow precipitate of silver iodide, which is insoluble in concentrated ammonia
Chlorine reacts with water to form?
chloric(I) acid and HCl
Chloric(I) acid kills what is water supplies and swimming pools?
bacteria
Chlorine reacts with cold dilute sodium hydroxide solution to produce what?
chloride ions and chlorate(I) ions
