\2ms Date
Practice IB Bxam: Topic 1 Quantitative Chemistry
1. Al and
The relativemolecularmassof aluminiumchloride is 267 and its compositionby massis 20.3%o
79.7%chlorine.Determinethe empiricaland molecularformulasof aluminium chloride.
;;/ o/; i,a.!3
; ffi;; o::)si;iiJ//
'g;V;;,'ie / F;ia/1 :t
no/al
,
ft.tg ft/"/s= 26:rfr*t1s*2fi)=/s3.ttJ
(Total4 marks)
2. Sodiurnreactswith water as follows.
2Na(s)+ 2H2O(l)- 2NaOH(aq)+ Hz(g)
(Total 3 marks)
, 3. An organic compound,A, containingonly the elementscarbon,hydrogenand oxygerrwas analysed.
(a) A was found to contain54.57oC and 9.17oHby mass,the remainderbeingoxygen.Determine
the empiricalformulaof the compound. % O
@
(3)
(b) A 0.230g sam , when vaporized,had a volumeof 0.0785A*iat 95'C and 102 kPa.
Determinet
fu't
(3)
(c) Determinethe molecularformulaof A usingyour answersfrom pafts(a) and (b).
ne/+ r/Fl!' . F ?rto Q= t(tl,:t) *ry(1,f0* /(:6a = ??.o;
/7= 87,8
( 1)
(Total7 marks)
Practice IB Bxam: Topic 1 Quantitative Chemistry
1. Al and
The relativemolecularmassof aluminiumchloride is 267 and its compositionby massis 20.3%o
79.7%chlorine.Determinethe empiricaland molecularformulasof aluminium chloride.
;;/ o/; i,a.!3
; ffi;; o::)si;iiJ//
'g;V;;,'ie / F;ia/1 :t
no/al
,
ft.tg ft/"/s= 26:rfr*t1s*2fi)=/s3.ttJ
(Total4 marks)
2. Sodiurnreactswith water as follows.
2Na(s)+ 2H2O(l)- 2NaOH(aq)+ Hz(g)
(Total 3 marks)
, 3. An organic compound,A, containingonly the elementscarbon,hydrogenand oxygerrwas analysed.
(a) A was found to contain54.57oC and 9.17oHby mass,the remainderbeingoxygen.Determine
the empiricalformulaof the compound. % O
@
(3)
(b) A 0.230g sam , when vaporized,had a volumeof 0.0785A*iat 95'C and 102 kPa.
Determinet
fu't
(3)
(c) Determinethe molecularformulaof A usingyour answersfrom pafts(a) and (b).
ne/+ r/Fl!' . F ?rto Q= t(tl,:t) *ry(1,f0* /(:6a = ??.o;
/7= 87,8
( 1)
(Total7 marks)
