3.2.4- Period 3 Flashcards by Beth swain

Q

Sodium with water observation and equation

A

Melts
Moves over surface
Effervescence

2Na + 2H2O -> 2NaOH+ H2

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Q

Magnesium with water observations and equation

A

Cold water
Slow reaction
Mg+2H2O -> Mg(OH)2 + H2

Steam
Bright white fla
Solid residue
Mg + H2O -> MgO + H2

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Q

Sodium with oxygen
Observations
Equation

A

Burns with yellow flame

4Na + O2 -> 2Na2O

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Q

Magnesium with oxygen
Observation
Equation

A

Burn with white flame

2Mg + O2 —> 2MgO

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Q

Aluminium with oxygen
Observations
Equations

A

Burns with bright white flame only when powder

4Al+ 3O2–> 2Al2O3

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Q

Silicon with oxygen

A

Burns with bright white flame
Only with powder

Si +O2-> SiO2

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Q

Phosphorus with oxygen
Observations
Equation

A

Burns with bright white flame

P4+5O2-> P4O10

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Q

Sulfur with oxygen
Observations
Equation

A

Burns with bright blue flame
S+O2-> SO2
2SO2+O2 -> 2SO3

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Q

Melting point of oxides

A

Goes across period low no at Sulfur

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Q

Sodium oxide with water

And pH of solution

A

Na2O + H2O -> 2NaOH

Ph -14

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Q

Magnesium oxide with water

Ph of solution

A

MgO + H2O -> Mg(OH)2

Ph -9

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Q

Aliminium oxide with water

A

Insoluble

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Q

Silicon dioxide with water

A

Insoluble in water

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Q

Phosphorus oxide

Ph of solution

A

P4O10 +6H2O -> 4H3PO4

Ph -0

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Q

Acid structure for phosphorus

A

Draw

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Q

Anion structure for phosphorus

A

Draw

Q

Sulfur dioxide and water

Ph of solution

A

SO2 + H2O -> 2H+ + SO3 2-

pH- 3

Q

Sulphur dioxide acid structure

A

Draw

Q

Sulfur dioxide anion structure

A

Draw

Q

Sulphur trioxide with water

Ph of solution

A

SO3+H2O -> 2H+ + SO42-

Ph =0

Q

Sulfur trioxide acid structure

A

Draw

Q

Sulfur trioxide anion structure

A

Draw

Q

What are the two basic nature oxides

A

Na2O

MgO

Q

Sodium oxide with acid

A

Na2O + 2H+ -> 2Na+ + H2O

Q

Magnesium oxide with acid

A

MgO + 2H+ -> Mg 2+ + H2O

Q

What period 3 oxide has basic and acidic nature

A

Aluminium oxide

Q

Aluminium oxide with acid

A

Al2O3 + 6H+ -> 2Al3+ + 3H2O

Q

Aluminium oxide with base

A

Al2O3 + 2OH- + 3H2O -> 2Al(OH)4 -

Alumnate

Q

What period 3 oxides have acidic nature

A

SiO2
P4O10
SO2
SO3

Q

Silicon dioxide with base

A

SiO2 + 2OH- -> SiO3 2- + H2O

Silicate

Q

What is required for silicon dioxide and base to react

A

Hot conc NaOH

Q

Phosphorus oxide with base

A

P4O10 + 12OH- -> 4PO4 3- + 6H2O

Phosphate

Q

Sulphur dioxide with base

A

SO2+ 2OH- -> SO3 2- + H2O

Sulfate IV = sulphite

Q

Sulfur trioxide with base

A

SO3 + OH- -> SO42- +H2O

Sulphate VI