THE COMPETITION PROBLEMS FROM THE
INTERNATIONAL CHEMISTRY OLYMPIADS
Volume 1
1st – 20th IChO
1968 – 1988
Edited by Anton Sirota
IUVENTA, Bratislava, 2008
,THE COMPETITION PROBLEMS FROM THE INTERNATIONAL CHEMISTRY OLYMPIADS, Volume 1
Editor: Anton Sirota
ISBN 978-80-8072-082-7
Copyright © 2008 by IUVENTA – IChO International Information Centre, Bratislava, Slovakia
You are free to copy, distribute, transmit or adapt this publication or its parts for unlimited teaching purposes,
however, you are obliged to attribute your copies, transmissions or adaptations with a reference to "The
Competition Problems from the International Chemistry Olympiads, Volume 1" as it is required in the
chemical literature. The above conditions can be waived if you get permission from the copyright holder.
Issued by IUVENTA in 2008
with the financial support of the Ministry of Education of the Slovak Republic
Number of copies: 250
Not for sale.
International Chemistry Olympiad
International Information Centre
IUVENTA
Búdková 2
811 04 Bratislava 1, Slovakia
Phone: +421-907-473367
Fax: +421-2-59296123
E-mail:
Web: www.icho.sk
,Contents
Preface ............................. 1
VOLUME 1
The competition problems of the:
1st IChO ............................. 3
nd
2 IChO ............................. 11
rd
3 IChO ............................. 21
4th IChO ............................. 34
5th IChO ............................. 48
6th IChO ............................. 62
th
7 IChO ............................. 79
th
8 IChO ............................. 99
9th IChO ............................. 116
10th IChO ............................. 144
th
11 IChO ............................. 172
12th IChO ............................. 191
th
13 IChO ............................. 220
14th IChO ............................. 243
15th IChO ............................. 268
16th IChO ............................. 296
17th IChO ............................. 319
th
18 IChO ............................. 340
th
19 IChO ............................. 366
20th IChO ............................. 383
, Preface
This publication contains the competition problems from the first twenty International
Chemistry Olympiads (IChO) organized in the years 1968 – 1988. It has been published
by the IChO International Information Centre in Bratislava (Slovakia) on the occasion of
the 40th anniversary of this international competition.
Not less than 125 theoretical and 50 practical problems were set in the IChO in the
mentioned twenty years. In the elaboration of this collection the editor had to face certain
difficulties because the aim was not only to make use of past recordings but also to give
them such a form that they may be used in practice and further chemical education.
Consequently, it was necessary to make some corrections in order to unify the form of the
problems. However, they did not concern the contents and language of the problems.
Many of the first problems were published separately in various national journals, in
different languages and they were hard to obtain. Some of them had to be translated into
English. Most of the xerox copies of the problems could not be used directly and many
texts, schemes and pictures had to be re-written and created again. The changes concern
in particular solutions of the problems set in the first years of the IChO competition that
were often available in a brief form and necessary extent only, just for the needs of
members of the International Jury. Some practical problems, in which experimental results
and relatively simply calculations are required, have not been accompanied with their
solutions. Recalculations of the solutions were made in some special cases ony when the
numeric results in the original solutions showed to be obviously not correct. Although the
numbers of significant figures in the results of several solutions do not obey the criteria
generally accepted, they were left without change.
In this publication SI quantities and units are used and a more modern method of
chemical calculations is introduced. Only some exceptions have been made when, in an
effort to preserve the original text, the quantities and units have been used that are not SI.
Unfortunately, the authors of the particular competition problems are not known and
due to the procedure of the creation of the IChO competition problems, it is impossible to
assign any author's name to a particular problem. Nevertheless, responsibility for the
scientific content and language of the problems lies exclusively with the organizers of the
particular International Chemistry Olympiads.
1
INTERNATIONAL CHEMISTRY OLYMPIADS
Volume 1
1st – 20th IChO
1968 – 1988
Edited by Anton Sirota
IUVENTA, Bratislava, 2008
,THE COMPETITION PROBLEMS FROM THE INTERNATIONAL CHEMISTRY OLYMPIADS, Volume 1
Editor: Anton Sirota
ISBN 978-80-8072-082-7
Copyright © 2008 by IUVENTA – IChO International Information Centre, Bratislava, Slovakia
You are free to copy, distribute, transmit or adapt this publication or its parts for unlimited teaching purposes,
however, you are obliged to attribute your copies, transmissions or adaptations with a reference to "The
Competition Problems from the International Chemistry Olympiads, Volume 1" as it is required in the
chemical literature. The above conditions can be waived if you get permission from the copyright holder.
Issued by IUVENTA in 2008
with the financial support of the Ministry of Education of the Slovak Republic
Number of copies: 250
Not for sale.
International Chemistry Olympiad
International Information Centre
IUVENTA
Búdková 2
811 04 Bratislava 1, Slovakia
Phone: +421-907-473367
Fax: +421-2-59296123
E-mail:
Web: www.icho.sk
,Contents
Preface ............................. 1
VOLUME 1
The competition problems of the:
1st IChO ............................. 3
nd
2 IChO ............................. 11
rd
3 IChO ............................. 21
4th IChO ............................. 34
5th IChO ............................. 48
6th IChO ............................. 62
th
7 IChO ............................. 79
th
8 IChO ............................. 99
9th IChO ............................. 116
10th IChO ............................. 144
th
11 IChO ............................. 172
12th IChO ............................. 191
th
13 IChO ............................. 220
14th IChO ............................. 243
15th IChO ............................. 268
16th IChO ............................. 296
17th IChO ............................. 319
th
18 IChO ............................. 340
th
19 IChO ............................. 366
20th IChO ............................. 383
, Preface
This publication contains the competition problems from the first twenty International
Chemistry Olympiads (IChO) organized in the years 1968 – 1988. It has been published
by the IChO International Information Centre in Bratislava (Slovakia) on the occasion of
the 40th anniversary of this international competition.
Not less than 125 theoretical and 50 practical problems were set in the IChO in the
mentioned twenty years. In the elaboration of this collection the editor had to face certain
difficulties because the aim was not only to make use of past recordings but also to give
them such a form that they may be used in practice and further chemical education.
Consequently, it was necessary to make some corrections in order to unify the form of the
problems. However, they did not concern the contents and language of the problems.
Many of the first problems were published separately in various national journals, in
different languages and they were hard to obtain. Some of them had to be translated into
English. Most of the xerox copies of the problems could not be used directly and many
texts, schemes and pictures had to be re-written and created again. The changes concern
in particular solutions of the problems set in the first years of the IChO competition that
were often available in a brief form and necessary extent only, just for the needs of
members of the International Jury. Some practical problems, in which experimental results
and relatively simply calculations are required, have not been accompanied with their
solutions. Recalculations of the solutions were made in some special cases ony when the
numeric results in the original solutions showed to be obviously not correct. Although the
numbers of significant figures in the results of several solutions do not obey the criteria
generally accepted, they were left without change.
In this publication SI quantities and units are used and a more modern method of
chemical calculations is introduced. Only some exceptions have been made when, in an
effort to preserve the original text, the quantities and units have been used that are not SI.
Unfortunately, the authors of the particular competition problems are not known and
due to the procedure of the creation of the IChO competition problems, it is impossible to
assign any author's name to a particular problem. Nevertheless, responsibility for the
scientific content and language of the problems lies exclusively with the organizers of the
particular International Chemistry Olympiads.
1
