WGUl D425l Finall Examl (Latestl 2026/l
2027l Update)l Introductionl tol Chemistryl
Review|l 100%l Verifiedl Questionsl &l
Answersl |l Gradel A
Q:l Whatl isl thel trendl forl atomicl radiusl onl thel periodicl table?
Answer:
Atomicl radiusl decreasesl froml leftl tol rightl acrossl al periodl andl increasesl downl al group.
Q:l Howl dol youl determinel thel chargel ofl anl ionl forl al main-groupl element?
Answer:
Usel thel groupl number:l metalsl losel electronsl tol forml positivel cations,l non-metalsl gainl
electronsl tol forml negativel anions.
Q:l Whatl arel thel hallmarksl ofl al chemicall change?
Answer:
Colorl change,l gasl productionl (bubbles),l formationl ofl al precipitate,l orl significantl energyl
changel (heat/light).
Q:l Whatl isl thel differencel betweenl al solutel andl al solvent?
Answer:
Thel solutel isl thel substancel beingl dissolved,l whilel thel solventl isl thel mediuml inl whichl
thel solutel dissolves.
,Q:l Whatl isl thel generall rulel forl determiningl solubilityl basedl onl polarity?
Answer:
Likel dissolvesl like:l polarl solventsl dissolvel polarl solutes,l andl nonpolarl solventsl dissolvel
nonpolarl solutes.
Q:l Howl dol saturated,l unsaturated,l andl supersaturatedl solutionsl differ?
Answer:
Unsaturatedl containsl lessl thanl thel maximuml solute;l saturatedl containsl thel maximuml
amount;l supersaturatedl containsl morel thanl thel maximuml underl specificl conditions.
Q:l Whatl isl thel formulal forl Molarityl (M)?
Answer:
Molesl ofl solutel dividedl byl litersl ofl solution.
Q:l Whatl isl thel dilutionl equation?
Answer:
M1V1l =l M2V2
Q:l Howl doesl anl Arrheniusl acidl differl froml al Bronsted-Lowryl acid?
Answer:
Arrheniusl acidsl producel H+l inl water;l Bronsted-Lowryl acidsl arel protonl (H+)l donors.
Q:l Whatl distinguishesl al strongl acidl froml al weakl acid?
Answer:
Strongl acidsl dissociatel completelyl inl water,l whilel weakl acidsl onlyl partiallyl dissociate.
,Q:l Whatl isl thel purposel ofl al buffer?
Answer:
Tol resistl changesl inl pHl whenl smalll amountsl ofl acidl orl basel arel added.
Q:l Howl arel pHl andl pOHl related?
Answer:
pHl +l pOHl =l 14
Q:l Whatl isl thel goall ofl al titrationl experiment?
Answer:
Tol determinel thel concentrationl ofl anl unknownl solutionl byl reactingl itl withl al solutionl
ofl knownl concentration.
Q:l Whatl isl chemicall equilibrium?
Answer:
Al statel wherel thel ratesl ofl thel forwardl andl reversel reactionsl arel equal,l resultingl inl
constantl concentrationsl ofl reactantsl andl products.
Q:l Ifl Ql <l Keq,l inl whichl directionl willl thel reactionl proceed?
Answer:
Towardl thel productsl (forwardl direction).
Q:l Ifl Ql >l Keq,l inl whichl directionl willl thel reactionl proceed?
Answer:
Towardl thel reactantsl (reversel direction).
, Q:l Whatl doesl Lel Chatelier'sl Principlel state?
Answer:
Ifl al systeml atl equilibriuml isl disturbed,l itl willl shiftl tol counteractl thel disturbancel andl
re-establishl equilibrium.
Q:l Whatl arel thel fourl parametersl usedl tol describel al gas?
Answer:
Amountl (n),l volumel (V),l temperaturel (T),l andl pressurel (P).
Q:l Whatl isl thel Ideall Gasl Lawl equation?
Answer:
PVl =l nRT
Q:l Underl whatl conditionsl dol reall gasesl behavel mostl likel ideall gases?
Answer:
Highl temperaturel andl lowl pressure.
Q:l Whatl isl thel relationshipl betweenl pressurel andl volumel accordingl tol Boyle'sl Law?
Answer:
Inverselyl proportionall (atl constantl temperature).
Q:l Whatl isl thel relationshipl betweenl volumel andl temperaturel accordingl tol Charles'sl
Law?
Answer:
2027l Update)l Introductionl tol Chemistryl
Review|l 100%l Verifiedl Questionsl &l
Answersl |l Gradel A
Q:l Whatl isl thel trendl forl atomicl radiusl onl thel periodicl table?
Answer:
Atomicl radiusl decreasesl froml leftl tol rightl acrossl al periodl andl increasesl downl al group.
Q:l Howl dol youl determinel thel chargel ofl anl ionl forl al main-groupl element?
Answer:
Usel thel groupl number:l metalsl losel electronsl tol forml positivel cations,l non-metalsl gainl
electronsl tol forml negativel anions.
Q:l Whatl arel thel hallmarksl ofl al chemicall change?
Answer:
Colorl change,l gasl productionl (bubbles),l formationl ofl al precipitate,l orl significantl energyl
changel (heat/light).
Q:l Whatl isl thel differencel betweenl al solutel andl al solvent?
Answer:
Thel solutel isl thel substancel beingl dissolved,l whilel thel solventl isl thel mediuml inl whichl
thel solutel dissolves.
,Q:l Whatl isl thel generall rulel forl determiningl solubilityl basedl onl polarity?
Answer:
Likel dissolvesl like:l polarl solventsl dissolvel polarl solutes,l andl nonpolarl solventsl dissolvel
nonpolarl solutes.
Q:l Howl dol saturated,l unsaturated,l andl supersaturatedl solutionsl differ?
Answer:
Unsaturatedl containsl lessl thanl thel maximuml solute;l saturatedl containsl thel maximuml
amount;l supersaturatedl containsl morel thanl thel maximuml underl specificl conditions.
Q:l Whatl isl thel formulal forl Molarityl (M)?
Answer:
Molesl ofl solutel dividedl byl litersl ofl solution.
Q:l Whatl isl thel dilutionl equation?
Answer:
M1V1l =l M2V2
Q:l Howl doesl anl Arrheniusl acidl differl froml al Bronsted-Lowryl acid?
Answer:
Arrheniusl acidsl producel H+l inl water;l Bronsted-Lowryl acidsl arel protonl (H+)l donors.
Q:l Whatl distinguishesl al strongl acidl froml al weakl acid?
Answer:
Strongl acidsl dissociatel completelyl inl water,l whilel weakl acidsl onlyl partiallyl dissociate.
,Q:l Whatl isl thel purposel ofl al buffer?
Answer:
Tol resistl changesl inl pHl whenl smalll amountsl ofl acidl orl basel arel added.
Q:l Howl arel pHl andl pOHl related?
Answer:
pHl +l pOHl =l 14
Q:l Whatl isl thel goall ofl al titrationl experiment?
Answer:
Tol determinel thel concentrationl ofl anl unknownl solutionl byl reactingl itl withl al solutionl
ofl knownl concentration.
Q:l Whatl isl chemicall equilibrium?
Answer:
Al statel wherel thel ratesl ofl thel forwardl andl reversel reactionsl arel equal,l resultingl inl
constantl concentrationsl ofl reactantsl andl products.
Q:l Ifl Ql <l Keq,l inl whichl directionl willl thel reactionl proceed?
Answer:
Towardl thel productsl (forwardl direction).
Q:l Ifl Ql >l Keq,l inl whichl directionl willl thel reactionl proceed?
Answer:
Towardl thel reactantsl (reversel direction).
, Q:l Whatl doesl Lel Chatelier'sl Principlel state?
Answer:
Ifl al systeml atl equilibriuml isl disturbed,l itl willl shiftl tol counteractl thel disturbancel andl
re-establishl equilibrium.
Q:l Whatl arel thel fourl parametersl usedl tol describel al gas?
Answer:
Amountl (n),l volumel (V),l temperaturel (T),l andl pressurel (P).
Q:l Whatl isl thel Ideall Gasl Lawl equation?
Answer:
PVl =l nRT
Q:l Underl whatl conditionsl dol reall gasesl behavel mostl likel ideall gases?
Answer:
Highl temperaturel andl lowl pressure.
Q:l Whatl isl thel relationshipl betweenl pressurel andl volumel accordingl tol Boyle'sl Law?
Answer:
Inverselyl proportionall (atl constantl temperature).
Q:l Whatl isl thel relationshipl betweenl volumel andl temperaturel accordingl tol Charles'sl
Law?
Answer:
