AQA A Level Chemistry Past Paper Questions And Accurate Answers.

AQA A-LEVEL CHEMISTRY PAST PAPER QUESTIONS.

Themsamplemismbombardedmwithmhighmenergymelectronsmandmknocksmoutmanmelectronmfo
rmingm1+mrubidiummionsmthroughmusingmanmelectronmgun.m-
m"ACCURATEmANSWER"mmExplainmhowmthemgaseousmatomsmofmrubidiummaremionizedminm
ammassmspectrometer(2)

Rb(g)---Rb+(g)+e(-)m-
m"ACCURATEmANSWER"mmWritemanmequation,mincludingmstatemsymbols,mtomshowmthempro
cessmthatmoccursmwhenmthemfirstmionizationmenergymofmrubidiummismmeasured(1

1)mShakemthemfinalmsolutionminmthemflask.
2)Ensuremthembottommofmthem(liquid)meniscusmismonmthemgraduationmmark.
3)Washmthemwetmrodmintomthemflask.m-
m"ACCURATEmANSWER"mmReadmthemfollowingminstructionsmthatmdescribemhowmtommakem
upmamstandardmsolutionmofmamsolidminmamvolumetricmflask.m
Answermthemquestionsmwhichmfollow.
"Takemamcleanm250cm3mvolumetricmflask.mUsemthembalancemprovidedmandmamclean,mdrym
container,mtomweighmoutmthemamountmofmsolidmrequired.m
Tipmthemsolidmintomamclean,mdrym250cm3mbeakermandmaddmaboutm100cm3mofmdistilledm
water.m
Usemamstirringmrodmtomhelpmthemsolidmdissolve,mcarefullymbreakingmupmanymlumpsmofmsli
dmwithmthemrod.m
Whenmthemsolidmhasmdissolved,mpourmthemsolutionmintomthemflaskmusingmamfiltermfunnel.
m
Addmwatermtomthemflaskmuntilmthemlevelmrisesmtomthemgraduationmmark"

SUGGESTmTHREEmFURTHERmINSTRUCTIONSmWHICHmWOULDmIMPROVEmTHEmOVERALLmTECH
NIQUEmINmTHISmACCOUNT.(3)

Cu2(OH)2CO3+4HCL---2CuCl2+3H20+CO2m-
m"ACCURATEmANSWER"mmCompoundsmcontainingmCu2+,mOH-
mandmCO3(2-)mionsmaremsometimesmdescribedmasmbasicmcoppermcarbonates
(a)mSolidmCu(OH)2CO3mismaddedmtomanmexcessmofmdilutemhydrochloricmacid.mAmsolutionm
ofmcopper(2)chloridemismformed,mtogethermwithmtwomothermproducts.
(i)mWritemanmequationmformthemreaction.

bubblesmcouldmbemobserved.m-
m"ACCURATEmANSWER"mm4a(ii)mSuggestmonemobservationmwhichmcouldmbemmademduringm
themreaction

Simplestmwholemnumbermratiomofmthematomsmofmeachmelementmpresentminmamcompound.
m-m"ACCURATEmANSWER"mmSuggestmwhatmismmeantmbymthemtermmempiricalmformula(2)

PVm=mnRTm-m"ACCURATEmANSWER"mmStatemthemidealmgasmequation(1)

Themabilitymofmanmatommtomattractmampairmofmelectronsmfrommamcovalentmbond.m-
m"ACCURATEmANSWER"mmDescribemwhatmismmeantmbymthemterm,m"electronegativity"(1)

amcovalentmbondm(amsharedmpairmofmelectrons)minmwhichmbothmelectronsmcomemfrommth
emsamematom.m-
m"ACCURATEmANSWER"mmDescribemwhatmismmeantmbym"DativemCovalent"mbonding(1)

HydrogenmBonding.