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Alex T. ZhaoGreg KerrIB Chem HLSeptember 7, 12

Separation o mixt!re" b# $iltration an% &r#"talli'ation

Background:The "eparation o a mixt!re o t(o "oli%" &an oten bea&hie)e% b# *ltration an% &r#"talli'ation. To be "!&&e""!l thi"re+!ire" that the &omponent" o the mixt!re ha)e %ierent"ol!bilitie" in a parti&!lar "ol)ent.

Aim:-!rpo"e o thi" experiment i" to "eparate a So%i!m Chlori%e&har&oal mixt!re b# *ltration, an% a Copper II/0Chlori%e mixt!re b#&r#"talli'ation.

Equipment required:

Balan&e

$ilter !nnel "tan%

$ilter !nnel

Hotplate

at&h gla""

Gla"" ro%

Beaer" t(o 133mL/

Gra%!ate% lin%er 24

mL

$ilter paper

So%i!m &hlori%e0&har&oalmixt!re 5g/

So%i!m&hlori%e0&opperII/&hlori%e mixt!re 6g/

thanol 24mL/

8i"tille% (ater

Boiling &hip

IB Chemi"tr# HL Lab 2 September 7, 2312

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Part A: Separation of a Sodium Chloride and CharcoalMixture.

Ober!ation:

So%i!m Chlori%e0&har&oal mixt!re9 po(%er, "oli%, opa+!e,

"mooth in text!re, o%orle"", "li)er# gre#, tra&e" o (hite,&r#"talline parti&le" "alt/

:aCl Cr#"tal" ater"eparation9 hite,&r#"talline, "oli%,

opa+!e, o%orle"", grain# not*ne/, po(%er# to "omeextent/

Char&oal9 Smooth,

"oli%, "il)er# gre#, opa+!e,

o%orle"", po(%er#, *ne.

Part B: Partial Separation of aSodium Chloride and Copper "##$ Chloride Mixture.

Ober!ation:

Copper II/ Chlori%e0So%i!m Chlori%e "ol!tion9 Graining,

"oli%, opa+!e, o%orle"". Copper II/ Chlori%e i" o bl!i"hgreen, So%i!m Chlori%e i" grain#, (hiti"h &r#"tal".

The "oli% *ltere% o!t i" %ar green, (ith "mall tra&e" obl!e, o%orle"" &r#"tal", "oli%, opa+!e.

$iltrate9 Clear, tran"parent, li+!i%, bl!i"h green Ater the "oli% *ltere% i" (a"he% (ith ethanol, it t!rn"

lighter in &olor, an% t!rn" rom a %ar bl!i"h green togreeni"h (hite0mil# green &olor. ;ther ph#"i&al propertie"retain. Thi" implie" that the "oli% i" a&t!all# So%i!mChlori%e, an% not Copper II/ Chlori%e.

Part C: Separation of a Sodium Chloride and Copper "##$Chloride Mixture.

Ober!ation:

Appearan&e o Soli%9 Cr#"talline, "oli%, opa+!e, %ar

greeni"h, "oli%, opa+!e, o%orle"", grain#

Appearan&e o *ltrate9 Clear, tran"parent, %ar bl!i"hgreen, o%orle"".

Proceing reult% and quetion:&. In part A, the "ol!bilit# o "o%i!m &hlori%e in (ater allo(e% !" to

"eparate it rom &har&oal. hen the mixt!re o "oli%" (a" "tirre%into the (ater, the :aCl "alt/ %i""ol)e% &ompletel# (hile the

&har&oal remaine% !n%i""ol)e%. hen the mixt!re i" *ltere%, the

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&har&oal i" *ltere% o!t, (hile the *ltrate i" reall# "alt (ater. Heatingthe *ltrate then boil" o the (ater, lea)ing !" (ith "alt &r#"tal"

'. In part B, (e "eparate% o!t "ome p!re "o%i!m &hlori%e, b!t the*ltrate &ontaine% both "o%i!m &hlori%e an% Copper II/ Chlori%e. B#heating the (ater in the *r"t pla&e, (e are in&rea"ing the "ol!bilit#

o "!b"tan&e" in (ater "lo(l#. The a&t that "ome o the "o%i!m&hlori%e (a" *ltere% o!t "ho(" that a" the (ater heate% !p, mo"t othe &opper II/ &hlori%e be&ame %i""ol)e% th!" &ame o!t in *ltrate/,(hile onl# "ome o the So%i!m Chlori%e (a" %i""ol)e% "ome &ameo!t in *ltrate an% "ome (ere *ltere% o!t./ Thi" implie" that the"ol!bilit# o Copper II/ Chlori%e