Forming Hydrogen Halides

what is a hydrogen halide?

a molecule that has both a hydrogen and a halogen with the formula HX

how are hydrogen halides formed?

by adding a concentrated acid to an ionic halide compound

why are halide ions reducing agents?

they loose an electron in reactions

why does the reducing power increases down the halogens?

atomic radius increases and there is more shielding and the attractive force gets weaker down the group so the electron is lost more easily

what is the problem using sulfuric acid to produce HBr and HI?

you get sulfur based impurities

what is H2SO4?

an oxidising agent

what are the uses of chlorine?

sterilizing water for drinking, making bleach and making paper

what are the risks of chlorine?

toxic and corrosive, and an oxidising agent so should be kept away from flammable materials. transport under pressure in liquid.

what are the products from reacting Chloride with H2SO4?

HCl

what are the products from reacting Bromide with H2SO4?

HBr Br2 SO2

what are the products from reacting Iodide with H2SO4?

HI I2 SO2 S H2S

what are the observations of HCl/HBr/HI and the type of reaction?

misty white fumes, an acid reaction

what are the observations of Br2/I2 and the type of reaction?

orange/purple fumes, an oxidation reaction

what are the observations of SO2 and the type of reaction?

colourless gas, a reduction reaction

what are the observations of S and the type of reaction?

a yellow solid, a reduction reaction

what are the observations of H2S and the type of reaction?

a colourless gas and rotten egg smell, a reduction reaction