period 3 oxides Flashcards by Phoebe Gillis

reaction of sodium with cold water

fizzes
2Na(s) +2H2O —> 2NaOH + H2

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magnesium with steam equation

Mg(s) + H2O(g) —–> MgO (s) +H2

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does magnesium react faster slower with hot water than cold water

faster

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what colour flame does sodium burn with and what colour is its precipitate

yellow flame
white precipitate

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equation of sodium burning in oxygen

4Na(s) +O2(g) —-> 2Na2O

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what colour flame and precipitate does Mg produce when burned in O2

white flame
white ppt

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what colour flame and precipitate is formed when Al is burned in O2

white flame and white ppt

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what colour flame and precipitate is produced when silicon is burned in oxygen

white flame and white ppt

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what colour flame and precipitate is formed when phosphorus is burned in oxygen

white flame and white ppt

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equation for mg being burned in o2

2Mg(s) + O2(g) –> 2MgO(s)

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equation for al being burned in o2

4Al(s) + 3O2 —-> 2Al2O3

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equation for si being burned in oxygen

Si(s) + O2 —> SiO2(s)

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reaction of phosphorus being burned in oxygen

4P(s) + 5O2 —> P4O10

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how many lone pair does so2 have

1
then the two oxygens are both bonded by double bonds

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what is the structure of sulphur trioxide

sulphur surrounded by 3 oxygens all with double bonds

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what kind of structure do Na2O, MgO and Al2O3 have

ionic

does Al2O3 display covalent character

yes

why does Al2O3 display covalent character

ionic bonding is weakened by charged Al3+ and oxide ions.

why might aluminium oxide react as it should

the high lattice strength of Al2O3 and its solubility in water make an impermeable layer to air and water

what kind of structure do P4O10 AND SO2 have

simple covalent

which has a higher Mpt P4O10 or SO2

SO2 - it is larger - therefore has more e and higher mpt

equation between Na2O and H2o (l)

2Na+(aq) + 2OH- (aq)

this is a vigorous exothermic reaction

pH13

reaction between MgO + h20

Mg(OH)2
pH 9

what do ionic oxides act as

brownsted lowry bases

which is better for treating acid in e.g. rivers or in the stomach NaOH or Mg(OH)2

Mg(OH)2 it is sparingly soluble and weakly alkaline - so using an excess would not make the water majorly alkaline

is aluminum oxide insoluble in water

yes

is silicon dioxide insoluble in water

yes

an equation for the reaction between sodium oxide and sulfuric acid

Na2O(s) + H2SO4 (aq) ----->Na2SO4(aq) + H2O (l)

what do sodium and magnesium oxides react to form

salt and water but this is ONLY mg and Na

what is the equation between magnesium oxide and hydrochloric acid

MgO(s) +2HCl (aq) --->MgCl2(aq) +H2O(l)

what type of oxide is aluminium oxide

and amphoteric oxide it reacts with both acids and bases

what is the reaction of Al2O3 and HCl

Al2O3 +6HCl ---> 2AlCl3 (aq) +3H2O (l)

what is the reaction equation between Al2O3(s) +2NaOH (aq) +3H2O

Al2O3 +2NaOH +3H2O -->2NaAl(OH)4

what will happen to sillicon dioxide when reacted with hot conc sodium hydroxide

it will react as a weak acid with strong bases a colourless solution of sodium silicate will form

what is the the equation between SiO2 and conc NaOH

SiO2 (s) + 2NaOH (aq) --- Na2SiO3 (aq) + H20(l)

what is the overall equation of the reaction of H3PO4 and conc NaOH

3NaOH (aq) +H3PO4-----> Na3PO4(aq) +3H2O

What happens when sulphur dioxide reacts with sodium hydroxide

first SO2(aq) + NaOH(aq) ---> NaHSO3 NaHSO3 +NaOH ----> Na2SO3 +H2O