2. Inorganic AS Flashcards
what happens to the solubility of group 2 hydroxides as you go down the group?
it increases
what is the general equation for the group 2 hydroxides dissolving in water?
what happens to the solubility of group 2 sulfates as you go down the group?
it decreases
what is the general equation for group 2 oxides with dilute HCl?
what is the reaction of Be with oxygen,water, dilute HCl and dilute H2SO4?
What is the reaction of Mg with oxygen,water,dilute HCl,dilute H2SO4?
What is the reaction of Ca with oxygen, water, dilute HCl and dilute H2SO4?
What is the reaction Sr with oxygen, water, dilute HCl and dilute H2SO4?
What is the reaction of Ba with oxygen, water, dilute HCl and dilute H2SO4?
what is the reaction of group 2 metals with oxygen?
What do Sr and Ba form when reacted with oxygen?
a peroxide MO2
What is the reaction for when metals react with water?
which group 2 element does not react with water?
Be
what is the general equation for the reaction of metals with dilute HCl?
What is the general equation for the reaction of metals with dilute H2SO4?
which two group 2 elements are insoluble?
SrSO4 and BaSO4
what is produced when an oxide/hydroxide reacts with dilute HCl?
chloride + water
what is produced when an oxide/hydroxide reacts with dilute sulfuric acid?
sulfate + water
all group 2 carbonates are soluble/insoluble except….
insoluble except BeCO3
carbonate + dilute HCl = ?
chloride + water + carbon dioxide
carbonate + dilute H2SO4 = ?
sulfate + water + carbon dioxide
what is limestone?
CaCO3 (calcium carbonate)
what is quicklime?
CaO (calcium oxide) - formed by the thermal decomposition of calcium carbonate
what is slaked lime ?
Ca(OH)2 - formed when water is added to quicklime
what happens to the volatility of group 7 elements going down the group?
it decreases as boiling point increases
what happens to the thermal stability of hydrogen halides going down the group?
it decreases as their hydrogen-halide bonds become weaker due to the increased atomic radius of the halogens
what happens to the reducing power of halide ions going down the group?
it increases as the outermost electrons are held less tightly to the positively charged nucleus as the ionic radii increases
how do you test for halides?
dissolve the solution in nitric acid and then add silver nitrate solution dropwise
what colour ppt does AgCl form?
white
what colour ppt does AgBr form?
cream
what colour ppt does AgI form?
yellow
what is added after the silver nitrate solution and why?
dilute/concentrated ammonia as the ppt could look very similar in colour
what is the unknown halide if it dissolves in dilute ammonia?
chloride
what is the unknown halide if it doesn’t dissolve in dilute ammonia but it does in concentrated ammonia?
bromide
what is the unknown halide if it doesn’t dissolve in dilute ammonia or concentrated ammonia?
iodide
what is the general reaction of halide ions with conc sulfuric acid
how is HCl gas produced?
conc H2SO4 is added to sodium chloride crystals
what are the reactions of Br- when reacted with conc H2SO4?
what are the reactions of I- when reacted with conc H2SO4?
what is the reaction of chlorine in cold alkali?
what is the reaction of chlorine in hot alkali?
