1968-04-27 — Page 15

27 APR 1963

B-DATEKORTHALL WAH KIU YAT PO

日 #2

#

#

DJ68英文中學會考試題預習專欄

www

曹勦備事

BERKOR

1968

試題顙習好酒

地理科 (廿六)

化學科

(二十六) 林錫衡。

複習題十六

複習項目 化合物學名,俗名

・化學式用途

寫出下列化合物之俗名化學式及主要用 途一種:

(1)硫酸銅 (2)硫酸亞鉄 (3)硫酸鋅 (4)硫酸 (4)硫酸鎂(5)重鉻酸鉀

(6)無水碳酸鈉 (7)碳酸鈉結晶 (8)砖醱 氫鈉(9)硫代硫酸鈉 (10)碳化鈣 (11) 氯 化铵 (12)氫氧化鈉 (13)硝酸鉀 (14)硝酸 鈉(1)硝酸钙 (16)鉻酸鉛 (17)氧化鉛 (18)硫酸鈣 (19)硫酸鈉(20)氧化亞氮 (21)氧化鈣(22)碳酸鈣 (23)氫氧化鈣

(20)氰化鉀 (25)三氧化二砷(26)高錳酸鉀

(27)逼氧化氫 (28)氯化汞(29)氯化汞 (30) $16$5

複涓題材五解答

定量分析計算常用下列關係

(一)質量=克當量数*克當量

(二)溶質克當量数=

(= N = V (4)

(三)一化學反應中(如酸鹼中和)任一反應物 所需用之克當量數及任一生成物之克 當量数相等,

如4『克當量,NaOH 必與4「克當量H2SO 作用,生成Na2SO4亦必為4克當量

有升塩酸

含有Hel

1000 x 1.1 x 200

= 220

(酥.

220

36.5

ttt

6.034 克當量,

= +355 36·5)

2.該酸液之濃度為6.034 N

# #*5 + Na2 CO2 x

(註: Na2CO3之當量=分子量÷

X

=1067.2 <=53

Na, CO2ttt.

25ml溶液含:Na2CO3詻·希克當量

21.0 w/ A Hel. 0.1050x hitt,

NaCl輿 HCI 無作用

'Geography (26)

WED·

45. Write a geographical account on each of these i

(a) Wheat farming in Australia (b) Cotton growing in the U.S.A.

A

*Ans.{a}

wheat farming is fustralia's most impor- tant agricultural occupation as some 50% of the total cropped area produces wheat. The principal wheatlands of Australia are situated on the in- terior plains and foothill slopes of New South Wales, Victoria and South Australia and in the} inland south-west of Western Australia. Some Wheat 18 also grown on the Darling Downs of Queensland. These areas are predominantly in th temperate southern half of Australia between thi 15" and 25" 18ohyets. The boundaries of the wheat belt are controlled on the inland side of the belt by decreasing rainfall and distance from, markete; on the coastal mide in the east and south-east the area is too wet and too ruggeá, while in the north the marked rainfall maximam is not suitable for wheat cultivation.

Wheat is widely grown in Australia for

the following reasons: Firstly, it is the only important crop which is in demand, overseas that will grow on the relatively dry inland areas of Australia without irrigation. Secondly, the dis- tribution and amount of rainfall, especially in the southern half of Australia, favours the growth j and ripening of the wheat. Thirdly, its flat or undulating topography favours the use of large machines and its moderately fertile soil is suitable for wheat cultivation when assisted by super-phosphate fertilisers. Fourthly, wheat production in Australiane assisted by government achemos to give drought relief, to take farmers

off marginal land and to relate prices.

As the winter temperature to the wheat- landa of Australia never falle below 20

inter wheat is grown. It has either an autumn-winter-sprin or winter-apring, period of growth so that "the winter. and spring rainfall ie of vital importance in the development of the crop. Temperatures of the whess belt are sufficiently mild in winter to permit plany growth throughout, the season. Plenty of warmth and" sunshine in October and, November kid in the forming of, ears and the ripening of the grain. Warm and dry weather in the early summer facilitates harvesting.

The basic farming practice is extensive with the use of machinery such as furrow ploughs. large harrows, seed drills, harvesters, at all stages. These machines are usually tractor-drawa The yield per sorem relatively low, about 14 bushels per acreri

aat cultivation and sheep

cultivated and

NG KONG PUBLICL

Na ̧ CO3 (**) * HOI (BE) ¢É

者所需克當量對應相等,故得:;

2/-0

Χ * =0.1050 7800

53

解之得ス=1,168(兎)

樣品中NGSCO含量1-165x100%

3.00

= 38.932

NaCl-38-93%= 61.07%

(3)解設支椒酸需V升

#

HCI 含量支V笕當量,

古N 鹽酸需(2-V)升

HC含量方(z-V)-

當量

{V+ (2-v);// = {xz

#=19" v=±·

∴支N之盜酸需支升

亢N之蓝酸票(一支)升=1支外

解(稀硫酸與氯化钡作用生成硫酸鋇

沉澱

Basi 2*=*‡‡ – 233-4 ≈ 116.7

233-4=116·7

Gk 18 Ba504: 1.24 「克當量

(硫酸立志當量数Nx1000

DAY

Too

\234°

(5)解設所× (注:氨

ritt..

六湖麻

(D)

日七廿月四年八六九一股公年七十五國民中

The United States grows over one quarter of the world's cotton. The Cotton Belt of the U.S.A. stretches from western Texas almost to tAC Atlantic coast. The northern boundary is marked by the line beyond which there are less than 200 frost-free days. The western boundary is marked by the 20" 18ohyst. To the south the 10" autumn isohyet marks the limit of cotton oulti- vation as rainfall in excess of this amount in the harvesting season tends to beat down and die. colour the patton. The eastern boundary on the Carolina-Georgia coast te indefinite since the ravages of the ball weevil, but some cotton is grown right to the coast in places, and also on The 18land just off the coast, Thia Sea Island potton is some of the finest in the world. Other cotton growing areas outside the cotton Belt are found in the Salt River district and the Sav Jaoquin Valley of California.

The topography of the Cotton Belt 1s mainly flat or undulating plain consisting of the Mississippi basin in the centre, the prairies to the west and the Atlantic coast plati to the east, The Appalachiane, the Ozarks and th Quachita Highlande are the exception and do not produse any cotton. The soils are generally for tile elluvium or làm, deep and easily cultivater but, because of bad farming practices, have been badly eroded in much of the ootton country. The olimate is of the humid sub-tropical type. Rain- fall varies from between 20 and 50" and the growing seneón ranges from 200 to 260 days. The rainfall is uniform with a spring maximu. The autumn is fairly dry, olear and cool so that picking can be carried out without interruption.

The size of the farme and plantations varies considerably. The largest are along the Mississippi Bottoms where they may be about 1,000 acres, but are often split up and workad › by tenants, Nost of the manual work on the cotton plantations is done by negross. The ma- jority of them work sa labourers on farme owned by white men but many now own or rent farms. In Texas, which is the leading state in cotton production, the plantations are often large_and highly mechaniar

In late winter the land is preparad} for the cotton in the spring, Drills are then used to ROW the cotton seed from the middle of February to the end of April. During the growing season the cotton has to be cultivatąd from six Losnine times to break up the soil and the planti sprayed to kill the boll' weevil and other insects. The blossoms appear in June and in six

«öökõ' time, the cotton bell bursts open exposing. oottoo which is ready for picking. Most of the cotton is picked by hand but efficient picking machines are becoming quite common ipv the Texas arsus. The date of the picking varies\WITH) letitude: -en the south, it begins in July; in the north, it falls in September, as soon as the cotton!- ~** placed it is hauled to the gan by waggons, trucki

and carta. #t the gin the fibra or the lint is Komparated from the seed_and_preased into 500_ baisa,}

50°

Gulf of Mexic、.

0

150 300/

ailes

The most productive areas in the Cotton Belt

1. The Red Prairies of Texas-@klahona

2. The Black · Prairie of Texas

3. The Mississippi Bottomlands

4. The Black Belt. of Alabama

S. The Piedmont-Area

6. The Inner Coastal Plain

7. The Sea Island District.

Questions for next klok

47.. For sach of these commodities: rice, tea jute

(a) Locate by nem s of a sktech map an importan-

exporting aras, sarking and naming a port which 19 used for the export of the crop. (b) State the geographical conditions needed.

for its cultivation.

*** 260 ml. 1. 25 mi. Op★ Ha30p. 號(一)克當量」

数

(6)解,設金属氧化物當量為E

(註:1-600克金属氧化物合當量

其他可依上列数題方法逐 而立得方程式)

25-0- (1x1000 - 1.600) = 0.1020 x 21-02 解土得 = 28.01 (韻金属氧化物當量

E 金福當量=金氧化物當量

一氧當量

=28.01-8

= 20.01

設硫酸濃度為比

NROM

此教意等於生成之8950克當量数)

根据题意立得方程式/x;

3510 MOTO

)

--=0.1×25-10

1167

* 0.2132′′n (MaSOU VI\),

100% = 31.68

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