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Chem Grp 2 + 7

Reactions and properties of group 2 and 7 elements

Write the reaction for magnesium with oxygen Mg (s) + 1/2O2 (g) -> MgO (s)
What is observed when magnesium burns in oxygen Bright flame
What is the product of a reaction between a group 2 metal and chloride Solid metal chloride XCl2 (s)
Ca (s) + H2O (l) -> ? Ca(OH)2 (aq) + H2 (g)
Be (s) + H2O (l)-> ? No reaction
Why does berylium not react with water an insoluble layer of berylium oxide forms
Mg (s) + 2H2O (g) -> ? Mg(OH)2 (aq) + H2
Colour change when chlorine is added to iron? Pale green -> Brown
Chlorine and bromide ions gives chloride ions and bromine
Colour of precipitate formed: bromide ions + silver nitrate? Soluble in concentrated ammonia solution? Cream. Yes.
Potassium bromide + sulfuric acid --> ? KHSO4 + HBr
All hydrogen halides... Fume in moist air, react with NH3 to form an ammonium halide and are soluble in water, forming acids
Bromine is what colour and in what state at RTP red-brown, gaseous
Adding PCl5 to an alcohol gives... steamy fumes of HCl and Haloalkanes
Name a natural cause of climate change Dissolving of CO2 in oceans,Solar eruptions, volcanic eruptions, formation of carbonates in rocks
Name an anthropogenic cause of climate change Burning fossil fuels, deforestation
Name five ways in which sustainability can be improved Use of renewable resources. Finding alternatives to hazardous chemicals. Discovering catalysts for reactions with hihg atom economies. Making more efficine use of energy. Reducing waste and preventing pollution
Group 2 nitrates decompose to form... NO2, O2 and Metal oxide
Which group of substances decompose to form carbon dioxide and a metal oxide Group 2 carbonates and lithium. NOT group 1 carbonates w/ sodium/below
Group 2 oxide with nitric acid gives... X(NO3)2 (aq) + H2O (l)
Created by: hampsteerhead