1. Abstract
Aimisto findthe Contentof ColdDrinksAvailable inthe Market.
Colddrinksof differentbrandsare composedof alcohol,carbohydrates,carbondioxidephosphate
ionsetc.These softdrinksgive feelingof warmth,lightnessandhave atangy tastewhichislikedby
everyone.Carbondioxide isresponsible fortheformationof frothonshakingthe bottle.
The carbon dioxide gasisdissolvedinwatertoformcarbonic acidwhichisalsoresponsibleforthe
tangy taste.Carbohydratesare thenaturally occurringorganiccompoundsandare majorsource
ofenergytoourbody.General formulaof carbohydratesisCX(H2O)Y.
On the basisof theirmolecule size carbohydratesare classifiedas:- Monosaccharide,Disaccharides
and Polysaccharides.Glucose isamonosaccharide withformulaC6H12O6 .It occurs inFree State
inthe ripengrapesinbonesandalsoinmany sweetfruits.Itisalsopresentinhumanbloodtothe
extentof about0.1%. Sucrose isoneof the mostuseful disaccharidesinourdailylife.
It iswidelydistributedinnature injuices,seedsandalsoinflowersof manyplants.The mainsource
of sucrose issugar cane juice whichcontain15-20 % sucrose and sugar beetwhichhasabout10-17
%sucrose.The molecularformulaof sucrose isC12H22O11. It isproducedbya mixture of glucose
and free dose.Itisnon-reducinginnature whereasglucose isreducing.Colddrinksare abitacidicin
nature and theiraciditycanbe measuredbyfindingtheirpHvalue.The pHvaluesalsodependupon
the acidiccontentssuch ascitricacid andphosphoricacid
DetectionOf PH:
1-2 dropsof the sample of colddrinkof each brandwas takenand puton the pH paper.The change
inthe colorof pH paperwas noticedandwascomparedwiththe standardpH scale
OBSERVATION
INFERENCE
Softdrinksare generallyacidicbecause of the presence of citricacidandphosphoricacid.pH values
of colddrinkof differentbrandsare differentdue tothe variationinamountof acidiccontents
Testfor Carbon Dioxide
EXPERIMENT
As soonas the bottleswere opened,one byone the sample waspassedthroughlime water.The
lime waterturnedmilky.
OBSERVATON
INFERENCE
All the softdrinkscontaindissolvedcarbondioxide inwater.The carbondioxide(CO2) dissolvesin
waterto form carbonicacid,whichis responsible foritstangytaste.
CHEMICAL REACTION INVOLVED
Ca(OH)2(s) + CO2(g) --->CaCO3 (s) + H2O(s)
2. TestFor Glucose
Glucose isa reducingsugar acid.Its presence isdetectedbythe followingtest:-
1. BENIDICTS’SSOLUTION TEST:-
A small sample of colddrinkof differentbrandswastakenina testtube anda few dropsof
Benedict’sreagentwereadded.The testtube washeatedforfew seconds.Formationof reddish
colorconfirmsthe presence of glucose incolddrinks
OBSERVATION
INFERENCEAll the samplesgave positive testforglucose withBenedict’sreagent.Hence all the
drinkscontainglucose
TEST FORALCOHOL
Samplesof eachbrand of colddrinksare takeninsample testtube andiodine followedbypotassium
iodide andsodiumhydroxide (NaOH) solutionisaddedtoeachtesttube.Thenthe testtube are
heatedinhotwater bathfor 30 minutesyellow coloredprecipitate confirmedthe presenceof
alcohol incolddrinks
OBSERVATION
Conclusion
• Afterconductingseveral tests,itwasconcludedthatthe differentbrandsof colddrinksnamely1.
Coca cola 2. Sprite 3. Limca 4. Fanta All containsglucose,alcohol sucrose,phosphate,ionsand
carbon dioxide.All are acidicinnature.
On comparingthe pH value of differentbrandscocacola ismost acidicand limcaisleastacidicof all
the four brandstaken.pH value of coca cola isnearlyequal todisinfectantwhichisharmful forbody.
CARBON DIOXIDEAmongthe four samplesof colddrinkstaken –sprite hasmaximumamountof
dissolvedcarbondioxideandFantahasminimumamountof dissolvedcarbondioxide.
DISADVANTAGESOFCOLDDRINKS
1. Soft drinksare little more harmful thansugarsolution.Astheycontainsugarinlarge amount
whichcause “diabetes”.
2. Soft drinkscan cause weightgainastheyinterfere withthe body’snatural abilitytosuppress
hungerfeeling.
3. Soft drinkshave abilitytodissolve the calciumsotheyare alsoharmful forour bones.
4. Soft drinkscontain“phosphoricacid”whichhasa pH of 2.8. So theycan dissolve anail inabout4
days.
5. For transportationof softdrinkssyrupthe commercial truckmust use the hazardousmatterplace
cards reservedforhighlyconsivematerial.
6. Soft drinkshave alsoabilitytoremove bloodsotheyare veryharmful toour body.
3. USES OF COLD DRINKS
1. Colddrinkscan be usedastoiletcleaners.
2. They can remove rustspotsfromchrome car humpers.
3. They cleancorrosionfromcar batteryterminals.
4. Soft drinksare usedas an excellent‘detergent’toremove grease fromclothes.
5. They can lose a rustedbolt.
