AQA A LEVEL Chemistry questions and answers 100% guaranteed success.

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AQA A LEVEL Chemistry questions and
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answers 100% guaranteed success.
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Relative xatomic xmass x- x xcorrect xanswer. x x xThe xaverage xmass xof xan xatom xof xan
xelement, xrelative xto x1/12th xof xthe xmass xof xan xatom xof xCarbon-12 x
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Relative xmolecular xmass x- x xcorrect xanswer. x x xAverage xmass xof xa xmolecule
xcompared xto x1/12th xof xthe xmass xof xa xcarbon-12 xatom x
x

The xAvogradro xconstant x- x xcorrect xanswer. x x xthe xnumber xof xparticles xin xa xmole x
x

ideal xgas xequation x- x xcorrect xanswer. x x xpV x= xnRT x
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empirical xformula x- x xcorrect xanswer. x x xthe xsimplest xwhole xnumber xratio xof xatoms xof
xeach xelement xin xa xcompound x
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percentage xatom xeconomy x- x xcorrect xanswer. x x x(Mass xof xdesired xproduct/total xmass
xof xreactants) xx x100 x
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ionic xbonding x- x xcorrect xanswer. x x xthe xelectrostatic xattraction xbetween xoppositely
xcharged xions xin xa xlattice x
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covalent xbond x- x xcorrect xanswer. x x xa xshared xpair xof xelectrons xbetween xnon-metal
xelements x
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co-ordinate xbond x- x xcorrect xanswer. x x xa xshared xpair xof xelectrons xwhere xboth
xelectrons xare xsupplied xby xone xatom x
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repulsion xin xshapes xof xmolecules x- x xcorrect xanswer. x x xLone xpair-lone xpair x> xlone
xpairbonding xpair x> xbonding xpair-bonding xpair x
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electronegativity x- x xcorrect xanswer. x x xthe xpower xof xan xatom xto xattract xthe xpair xof
xelectrons xin xa xcovalent xbond x
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hess' xlaw x- x xcorrect xanswer. x x xTotal xenthalpy xchange xfor xa xreaction xis xindependent
xof xthe xroute xchosen x
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mean xbond xenthalpy x- x xcorrect xanswer. x x xThe xenergy xrequired xto xbreak xa xcovalent
xbond xinto xgaseous xatoms xaveraged xover xdifferent xmolecules x
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, Bonds xbroken x- xbonds xmade x
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activation xenergy x- x xcorrect xanswer. x x xThe xminimum xamount xof xenergy xneeded xto
xstart xa xchemical xreaction x
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catalyst x- x xcorrect xanswer. x x xA xsubstance xthat xincreases xthe xrate xof xa xchemical
xreaction xwithout xbeing xchanged xby xproviding xan xalternative xreaction xpathway xby

xlowering xactivation xenergy x
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Le xChatelier's xprinciple x- x xcorrect xanswer. x x xWhen xa xsystem xin xdynamic xequilibrium
xis xsubjected xto xchange, xthe xposition xof xequilibrium xwill xshift xto xoppose xthe xchange. x
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oxidising xagents x- x xcorrect xanswer. x x xelectron xacceptors x
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reducing xagents x- x xcorrect xanswer. x x xelectron xdonors x
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Enthalpy xof xformation x- x xcorrect xanswer. x x xEnthalpy xchange xwhen xone xmole xof xa
xcompound xis xformed xfrom xits xconstituent xelements xunder xstandard xconditions xin

xtheir xstandard xstates x
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Enthalpy xof xatomization x- x xcorrect xanswer. x x xThe xenergy xrequired xto xproduce xone
xmole xof xgaseous xatoms xfrom xan xelement xin xits xstandard xstate x
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Electron xaffinity x- x xcorrect xanswer. x x xthe xenthaply xchange xwhen xone xmole xof
xgaseous xatoms xforms xone xmole xof x-1 xions x
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Lattice xenthalpy xof xformation x- x xcorrect xanswer. x x xEnthalpy xchange xwhen xone xmole
xof xa x

solid xionic xcompound xis xformed xfrom xits xconstituent xions xin xthe xgas xphase x
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Lattice xenthalpy xof xdissociation x- x xcorrect xanswer. x x xEnergy xchange xwhen x1 xmol xof
xan xionic xlattice xdissociates xto xits xgaseous xions. x
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standard xelectrode xpotential x- x xcorrect xanswer. x x x298K x x
100kPa x
1.00moldm-3 x
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Electrode xreactions xin xlithium xcell x
x(positive xelectrode) x- x xcorrect xanswer. x x x Li+ x+ xCoO2 x+ xe- x→ xLi+[CoO2]- x
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Electrode xreactions xin xlithium xcell x
x(negative xelectrode) x- x xcorrect xanswer. x x xLi x→ xLi+ x+ xe- x
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Electrode xreactions xin xhydrogen-oxygen xfuel xcell xin xacidic xconditions x
x(positive xelectrode) x- x xcorrect xanswer. x x x02 x+ x4H+ x+4e- x-> x2H20 x
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Electrode xreactions xin xhydrogen-oxygen xfuel xcell xin xacidic xconditions x
x(negative xelectrode) x- x xcorrect xanswer. x x x H2 x-> x2H+ x+ x2e- x
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Brosted- xlowry xAcid x- x xcorrect xanswer. x x xproton xdonor x
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Brosted- xlowry xbase x- x xcorrect xanswer. x x xproton xacceptor x
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weak xacids x- x xcorrect xanswer. x x xpartially xdissociate xin xaqueous xsolution x