Exam (elaborations)

OCR A A Level CHEMISTRY PAPER 1 Questions and Answers

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OCR A A Level CHEMISTRY PAPER 1 Questions and Answers

Institution

General Chemistry

Course

General Chemistry

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Institution: General Chemistry
Course: General Chemistry

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Uploaded on: April 29, 2025
Number of pages: 3
Written in: 2024/2025
Type: Exam (elaborations)
Contains: Questions & answers

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ocr a a level chemistry paper 1

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OCR A A Level CHEMISTRY PAPER 1

Testmformcarbonatesm-m"ACCURATEmANSWER"mm-maddmdilutemHCL
-mitmmakesmcarbonmdioxidem
testmformcarbonmdioxidembymbubblingmitmthroughmlimemwater

Testmformammoniummionsm-m"ACCURATEmANSWER"mm-addmsodiummhydroxidem
-warmmthemmixturem
-hovermdampmredmlitmusmpapermovermitm,mifmitmturnsmbluemthemionsmarempresent

Testmformsulphatemionzm(SO4m2-)m-m"ACCURATEmANSWER"mm-maddmdilutemHCL
-mthenmaddmBaCl2
-mBaSO4mismmademwhichmisminsolubleminmwatermsomamwhitemprecipitatemwillmbemformed

TestmformHalidesm(Cl-,mBr-,mI-)m-m"ACCURATEmANSWER"mm-maddmnitricmacidm
-maddmsilvermnitratem
-mprecipitatesmwillmbemformedm
-mClm(white)m,mBrm(cream)m,mIm(yellow)

Whymaddmdilutemacidsmwhenmtestingmformionsm?m-
m"ACCURATEmANSWER"mmitmwillmgetmridmofmanymlurkingmanionsmthatmmaymcreatemfalse
mpositives

Endothermicmenergymprofilemdiagramm-
m"ACCURATEmANSWER"mmproductsmaremhighermthanmreactants

Exothermicmenergymprofilemdiagramm-
m"ACCURATEmANSWER"mmreactantsmaremhighermthanmproducts

Whatmaremstandardmconditions?m-m"ACCURATEmANSWER"mm298Kmandm100kPa

Enthalpymchangemofmreactionm-
m"ACCURATEmANSWER"mmthementhalpymchangemwhenmthemreactionmoccursminmmolarmqua
ntitiesmshownminmthemchemicalmequationmundermstandardmconditions

Enthalpymchangemofmformationm-
m"ACCURATEmANSWER"mmthementhalpymchangemwhenm1mmolemofmcompoundmismformedm
frommit'smelementsminmtheirmstandardmstatesmundermstandardmconditions

Enthalpymchangemofmcombustionm-
m"ACCURATEmANSWER"mmthementhalpymchangemwhenm1mmolemofmamsubstancemismburne
dmcompletelyminmoxygenmundermstandardmconditions

Enthalpymchangemofmneutralisationm-
m"ACCURATEmANSWER"mmthementhalpymchangemwhenmanmacidmandmalkalimreactmunderms
tandardmconditionsmtomformm1mmolemofmwater

Bondmdissociationmenthalpym-
m"ACCURATEmANSWER"mmThementhalpymchangemrequiredmtombreakmamcovalentmbondmwit
hmallmspeciesminmthemgaseousmstate

howmtomfindmoutmenthalpymchangemofmcombustionminmthemlabm-
m"ACCURATEmANSWER"mm-mburnmthemfuelm
-mallowmitmtomheatmthemwaterm
-workmoutmthemchangeminmtemperaturemofmthemwater

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OCR A A Level CHEMISTRY PAPER 1 Questions and Answers

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