elements from the sea
No description yet. This curated deck is ready for daily study.
Card preview (10)
describe reasons why a titration may not be accurate?
• contaminated apparatus • titre not read at meniscus • repeats not done
name a reason why a sodium-thiosulfate titration may not work
starch indicator added too quickly
how do you make a hydrogen halide using an ionic halide?
add concentrated acid to a solid, concentrated ionic halide
why are hydrogen fluoride and hydrogen chloride stable when heated but HBr and HI are not?
decreasing strength of H-X bond
what is formed when Hydrogen halides react with ammonia?
ammonium halide
what is H2SO4 reduced to in the presence of HBr and HI?
HBr= SO2 HI= H2S
how do you convert a percentage into ppm?
multiply by 10,000
when will a metal be formed at the cathode?
if the metal is less reactive than hydrogen
when will a halogen be formed at the anode?
when the solution is concentrated and contains a halide
what does ROYGBIV mean?
red, orange, yellow, green, blue, indigo, violet