The University of the State of New York
221ST HiGH
SCHOOL EXAMINATION
Group III
APPLIED CHEMISTRY
Thursday, hne
19,1919-9.15
Answer at least one question from I
a. m. to 12.15 p. m., only
, Write at top of first page of answer paper (a) name of sOhool where you
hllvestttdied, (/.)number of week:s and recitations a week: In chemistry. with
thetotal number of laboratory
periods and the length of suoh periods.
, Themlnimum time requirement
is five reoitations a week for a school year.
.'A double la'Joratory period ooun~s in place of one recitation.
Laboratory·
"Work
equivalent to 30 double perIods is required.
Answer 10 questions, selecting at least one fl'om' each group.
7.Tell how to determine whether (a
of SIlk or of luster cellulose (artificial s
of cloth is all wool or part cotton [2] (
cotton or linen [2]. What advanta'gl
carbon tetrachloride instead of gasoli
of grease spots [2.1? Why is borax pr
soda for use in laundering woolen good
8 Distinguish between" fractional di
structive distillation
[6]. Mention t'lJ
each [4].
9 Make a labeled drawing of a bIas
use of the terms reducing agent, flux, n
scribe the smelting of an iron ore [8]. H
obtained from the blast furnace differ f
II
Group
I
Answer at least one question
from this group.
1 Mention tltree ways by which the speed of solution of
_a solid in a liquid may be increased
[3]. Distinguish
between solution and suspemdon
[2]. Name two liquid
:chemical compounds that are miscible with water [2].
" Nametltree liquids that are not miscible with water [3].
2 Make a labeled drawing of a Bunsen burner and of a
Bunsen flame, showing the name and the location of
three important parts of each [6]. Mention two important
, -practical applications
of 1l1odiiicd forms of the Bunsen
: burner [2]. What are the characteristics
of an efficient
i flameof a gas range [2J?
.'
3 Make a labeled drawing of a kitchen wo~d range or
, coalrange, showing the location of the grate, check, draft
and dampers [2]. Give directions for statting a fire in the
, range and state the scientific reason for the use of each
; suhstance employed and for the manipulation of the check,
(draft and dampers [6]. Trace the path of the hot, gaseous
{products when the oven damper (smoke damper) is open
andtheir path when it is closed [2J.
<
Group
from this group.
4 Mention three methods employed for treating impure
! waters to make them
safe for use in the home [3J. What
-is the meaning of each of the terms" hard water,"
temporary hard water" and "permanent
hard water" [3.1? Ex. plain, using equation, why a temporary hard water" can
-,be softened by using the right amount of slaked lime [4].
\ 5 How is milk (a) sterilized [2], (b) pasteurized [2], (e)
\ modified[2], (d) ho mogeni.zed [2J (e) powdered [2]? .
1 • 6 What purpose
does food serve in the body [4.1? What
ISthe meaning of the term II haluncecl rations Jl [2.1? Explainth~term "hyclrogcnatiol1 of oilH Jl [2]. Tell why this
process IS of great economic value [2J.
o
II
II
I
..
nr
of
10 Define and illustrate each
th
chemical change, compound, acid, basE
11 Write the chemical formula for ea
potassium chloride, zinc carbonate, sod
num sulphate, calcium sulphate [5J. .
names for the compounds represent
,ing formulas:
AgCI, (NH",) 2S0"" ]
Cr(OH) s [5].
12 Write an equation representing (a
of water by electrolysis [2J, (b) the bu
ai.r [2], (c) the neutralization of sulphur
hydroxide [2J, (d) the reaction between
and nitric acid [2J, (e) the combustion c
\
Group V
Answer at least one question from tl
II
Answer at least one question
Group
Answer at least o"nequestion from t
13 State and illustrate the meaning 0
nite proportibns [5J, (b),the law of mulL
14 Calculate the percentage
comp(
soda, Na2C0t-10H20.
[10J [Atomic
C=12,O=16~
15 The foIl wing reaction takes pI,
added to acre m of tartar baking powd
NaHCOs + HC",H40a =C02 +H2(
Calculate the umber of ounces of CI
would be requ red to react with four
bicarbonate.
10] -[Atomic weights:
C=12,O=16]
h'e University of the State of New York
221sT
HIGH
SCHOOL
APPLIED
EXAMINATION
Group
CHEMISTRY
ay, June 19,1919-9.15
a. m. to 12.15 p. m., only
topof first page of answer paper (a) name of school where you
,(b) number of weeks and recitations a week in chemistry, with
barof laboratory periods and the length of such periods.
um time requirement is five recitations a week for a school year.
')oratory period counts in place of one recitation.
Laboratory
lentto 30 double periods is required.
er 10 questions,
selecting
at least olle from· each group.
Group I
Answer at least one question from this group.
O!!
fentionthree ways by which the speed of solution of
. in a liquid may be increased [3]. Distinguish
..solution and suspension [2J. Name two liquid
1 compounds that are miscible with water [2J.
re,e liquids that are not miscible with water [3J.
e a labeled drawing of a Bunsen burner and of a
flame, showing the name and the location of
rtant parts of each [6J. Mention two important
'applications of modified forms of the Bunsen
. What are the characteristics
of an efficient
·gas range [2J?
e a labeled drawing of a kitchen wood range or
e, showing the location of the grate, check, draft
ers [2J. Give directions for starting a fire in the
state the scientific reason for the use of each
employed and for the manipulation of the check,
dampers [6J. Trace the path of the hot, gaseous
;whenthe oven damper (smoke damper) is open
r path when it is closed [2J.
Group
7 Tell how to determine whether (a) a necktie is made
of silk or of luster cellulose (artificial silk) [2J, (b) a sampl e
of cloth is all wool or part cotton [2J, (c) a handkerchief is
cotton or linen [2]. What advantage is there in using
carbon tetrachloride
instead of gasoline for the removal
of grease spots [2]? Why is borax preferable to washing
soda for use in laundering woolen goods [2J?
8 Distinguish between" fractional distillation" and" destructive distillation" [6J. Mention two practical uses of
each [4J..
9 Make a labeled drawing of a blast furnace.
Making
use of the terms reducing agent, flux, mineral and slag, describe the smelting of an iron ore [8J. How does the product'
obtained from the blast furnace differ from steel [2J?
Group
rv
Answer at least one question from this group.
10 Define and illustrate each of the following terms:
chemical change, compound, acid, base, salt. [10J
11 Write the chemical formula for each of the following:
potassium chloride, zinc carbonate, sodium sulphite, aluminum sulphate, calcium sulphate [5J. Write the chemical
names for the compounds represented
by the follow. ing formulas:
AgCl, (NH4) 2804'
FeCOs, Hg(NOs)"
CdOH) s [5].
.
12 Write an equation representing (a) the decomposition
of water by electrolysis [2J, (b) the burning of sulphur in
air [2J, (c) the neutralization of sulphuric acid with sodium
hydroxide [2J, (d) the reaction between calcium carbonate
and nitric acid [2J, (e) the combustion of alcohol [2].
.
Group V
II
Answer at least one question from this group.
Answer at least one question from this group.
tion three methods employed for treating impure
omake them safe for use in the home [3J. What
in~ of each of the terms" hard water," "tempowater" and "permanent hard water" [3J? Exg equation, why a temporary hard water" can
ed by using the right amount of slaked lime [4J.
is milk (a) sterilized [2], (b) pasteurized [2J (c)
[2J, (d) homogenized [2J (e) powdered [2J?
purpose does food serve in the body [4J? What
ning of the term
balanced rations" [2]? Exrm " hydrogenation of oils" [2J. Tell why this
f great economic value [2J.
II
I
I
II
III
Answer at least one question from this group.
13 State and illustrate the meaning of (a) the law of definite proportions [5J, (b) the law of multiple proportions [5].
14 Calculate the percentage
composition of washing
soda, Na2COs·10H20.
[1OJ [Atomic weights:
Na =23,
C=12,0=16J
15 The following reaction takes place when water is
added to a cream of tartar baking powder:
NaHCOs
KHC4H406
= CO2
H20
NaKC4H406•
Calculate the number of ounces of cream of tartar that
would be required to react with four ounces of sodium
bicarbonate.
[10J [Atomic weights:
N a = 23, K = 39,
C=12,0=16J
+
+
+