Inorganic chemistry flashcards A2

what is the reaction when sodium reacts with cold water
it fizzes on the surface
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what is the reaction of magnesium and water
reacts very slowly with cold water to form the hydroxide
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what is the reaction of magnesium and steam
magnesium water reacts more readily with steam to form the oxide
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write the formula for the reacton of sodium and oxygen
4Na(s) +02(g) ---> 2Na20(s)
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write the formula of magnesium and oxygen
2Mg(s) + O2(g) --> 2MgO(s)
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write the formula for aluminium and oxygen
4Al(s)+3O2(g)----->2 Al2O3(s)
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write the formula for silicon and oxygen
Si + O2(g) ----> SiO2(g)
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write the formula for phosphorous and oxygen
4P + 5O2 ----> P4O10(g)
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write the formula for sulphur and oxygen
S + O2(g)----> SO2(g)
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Describe the melting point going from Na to Al and explain why
The melting point increases from Na to Al because the bigger charges on the cations makes the electrostatic forces stronger meaning higher lattice enthalpies of dissociation
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why does SiO2 have a high melting and boiling point
it is a macromolecular covalent structure with many covalent bonds between atoms meaning high energy is needed to break strong covalent bonds
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why does p4O10 and SO2 have low melting and boiling points
both simple molecular structure they have weaker inter molecular forces, there is a small electronegativity value between the oxygen and and the non metal atom , P4O10 has more atoms so more van der waals so higher MPs
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what is formed when ionic oxides react with water
They produce hydroxide ions which are alkaline
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what is the reaction between sodium oxide and water and its Ph
Na2O + H20---> Na+ + 2OH- ph is 13
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what is the reaction between MgO and water and what is its Ph
MgO + H2O-----> Mg(OH)2 the Ph is 9
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what is different about the reaction of magnesium when it reacts with water
it is only slightly soluble because of the stronger lattice meaning fewer OH- ions are given off so Ph is lower
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whats the reaction of Al2O3 and water and its Ph
Al2O3 does not react in water because of it is a stronger lattice so it gives a neutral Ph of 7
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what is the reaction of sulphur with water and what is its ph
because sulphur is a macromolecular structure it does not dissolve in water so it gives off a neutral ph of 7
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what is the reaction between phosphorous and water and what is its ph
P4O10 + 6H2O ----> 4H3PO4 ph 0
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what is the reaction between sulphur dioxide and water and what is the Ph
SO2 + H2O ----> H2SO3 ph3
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What is the reaction between sulphur trioxide and water and what is the Ph
SO3 + H2O ----> H2SO4 ph0 as H+ is being added
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what is special about aluminium oxide in an acid base reaction
it is amphoteric and can act as an acid or a base
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How would you write out an acid base reaction
base + acid -----> salt + water
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write out the reaction between aluminium oxide and sulphuric acid
Al2O3 + 3H2SO4----> Al(SO4)3+3H2O
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write out the reaction for aluminium oxide and hcl
Al2O3 + 6HCl ----> 2AlCl3 + 3H2O
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what is the ionic equation when aluminium oxide reacts with an acid
Al2O3 + 6H+-----> 2Al^3+ + 3H2O
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what is the reaction of aluminium oxide and sodium hydroxide
Al2O3 + 2NaOH + 3H2O-----> 2NaAl(OH)4
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What is the reaction between aluminium oxide and hydroxide ions
Al2O3 + 2OH- + 3H2O -----> 2Al(OH)4^-
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write the reaction between phosphorous oxide and sodium hydroxide
P4O10 (s) + 12 NaOH (aq) ---> 4Na3PO4 (aq) + 6 H2O (l)
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write the reaction between phosphorous oxide and sodium oxide
P4O10 + 6 Na2O ----> 4Na3PO4
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write the reaction between sulphur dioxide and sodium hydroxide
SO2 (g) + 2NaOH (aq) ----> Na2SO3 (aq) + H2O (l)
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write the reaction between sulphur trioxide and sodium hydroxide
SO3 (g) + 2NaOH(aq)  Na2SO4 (aq) + H2O (l)
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write the ionic equation for phosphorous oxide and hydroxide ions
P4O10 (s) + 12 OH- (aq) -----> 4PO4 3-(aq) + 6 H2O (l)
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write the ionic equation for sulphur dioxide and hydroxide ions
SO2 (g) + 2OH- (aq) -----> SO3 2- (aq) + H2O (l)
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write the ionic equation for sulphur trioxide and hydroxide ions
SO3 (g) + 2OH- (aq) -----> SO4 2- (aq) + H2O (l)
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why does sio2 not dissolve in water or alkali solutions
because it has many strong covalent bonds
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what is the reaction between silicon oxide and concentrated sodium hydroxide
SiO2 + 2NaOH----> Na2SiO3+H2O
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Other cards in this set

Card 2

Front

what is the reaction of magnesium and water

Back

reacts very slowly with cold water to form the hydroxide

Card 3

Front

what is the reaction of magnesium and steam

Back

Preview of the front of card 3

Card 4

Front

write the formula for the reacton of sodium and oxygen

Back

Preview of the front of card 4

Card 5

Front

write the formula of magnesium and oxygen

Back

Preview of the front of card 5
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