Chemistry 2 - Analyzing substances

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  • Created by: Ls
  • Created on: 08-05-14 20:19
flame test process
Dip wire into hydrochloric acid and then solid, carry out test on roaring flame.
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Na+
Orange/yellow
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K+
Lilac
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Li+
Red/crimson
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Ca2+
Brick red
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ammonium ions process
Add sodium hydroxide to dissolved substance, heat gently whilst holding litmus paper on the mouth of testube.
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ammonium ions result
turns litmus paper blue, pungent smell, ammonia gas released (alkaline)
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ammonium ions equation
(NH4)2CO3 + 2NaOH --> 2NH3 + Na2CO3 + 2H2O
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metal ions process
add sodium hydroxide to dissolved solid
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Cu2+ (and ionic equation)
Blue ppt Cu2+(aq) + 2OH-(aq) --> Cu(OH)2(s)
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Fe2+ (and ionic equation)
Green ppt Fe2+(aq) + 2OH-(aq) --> Fe(OH)2(s)
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Fe3+ (and ionic equation)
Brown/orange ppt Fe3+(aq) + 3OH-(aq) --> Fe(OH)3(s)
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halide ions process
add silver nitrate to dissolved solid
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Cl- (and equation)
white ppt AgNO3(aq) + NaCl(aq) --> AgCl(s) + NaNO3(aq)
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Br- (and equation)
cream ppt AgNO3(aq) + NaBr(aq) --> AgBr(s) + NaNO3(aq)
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I- (and equation)
yellow ppt AgNO3(aq) + NaI(aq) --> AgI(s) + NaNO3(aq)
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sulphate ions process
add barium chloride to dissolved solid
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sulphate ions result
white ppt
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sulphate ions equation
Na2SO4(aq) + BaCl2(aq) --> BaSO4(s) + 2NaCl(aq)
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carbonate ions process and result
add hydrochloric acid to solid : effervesces
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carbon dioxide test process and result
quickly attach delivery tube to allow the gas to bubble through another test tube of lime water : turns milky
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carbonate ions equation
2HCl(aq) + Na2CO3 --> CO2(g) + H2O(l) + 2NaCl(aq)
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oxygen test process and result
add half a spatula of manganese dioxide and 2cm3 depth of hydrogen peroxide : relights a lighted splint
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oxygen test equation
2H2O(aq) --> O2(g) + 2H2O(l)
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hydrogen test process and result
add 2cm3 oh hydrochloric acid to a magnesium ribbon : lighted splint goes out through a squeaky pop
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hydrogen test equation
Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g)
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Card 2

Front

Orange/yellow

Back

Na+

Card 3

Front

Lilac

Back

Preview of the back of card 3

Card 4

Front

Red/crimson

Back

Preview of the back of card 4

Card 5

Front

Brick red

Back

Preview of the back of card 5
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