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百七十月二年白乙
WAEL KIU YAT PO
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日期
【升中指南 英文科教材
今日在麗的呼聲播出
化學科
(十五)
馮國成
第
上午十時卅分至十一時 時間:
下午六時至六時三十分
LESSON 39
(COMPREHENSION
日九十月三年五六九一麋公年四十五國民高中
汁 本版昨晚收到稿件
·å預科約在英过花一月,節返香港。
中中專價:醪史、地
美會大協界胡協考裹任主務校學大文中
外財册排氏保行事。 點 下跌
美飛分德熙胡
齮遨院務國國美應
塞倫高氏卷
英教大欲會期三九子,老除神秘默
耩及各化
華僑教育
(Q)強酸與弱塩墓或的酸與強建塞所生的盐)
都能與水起反想叫做水鮮
(b)中了氟的毒公司立刻以氛解之
(C)自來水加氟可保護牙齒健康...
id)木炭,焦碳均具還原性,可供冶金使用
(e)電解水時一氧在陽極上放出,氫在陰極
上放出其体積比為12
2.改正下列錯誤
CINHA(OHJA
(a) Nadi
by KS04
TETALO
d) zn (500)2
e) Kill
if KMn Os
(g)
CaHCO2
shi Mgzis
Ca POU
Na cl
(b) K2SO4
(g) Ca(Hca) (h)MgoNo (j) Cas(POA)
3.用方程式表明下列各項反應
(2)二氧化矽與鎂或炭共熱。 (b)硼砂濃溶液加硫酸共热
C)碳酸鈉溶液淇石灰水共煮
cia) Scl2 + 2Mg= 2 Mg O + Si
Si O2 + C CO2+ Sc
(C) Al. A (4)K.Mia (c)NH4OH
(b) Na2 Bq Ort H2 SOut SH2D = &H&B O3 + Nez 504
(c) Na2 CO + Ca(OH);
2NaOH+CaCO34
4. 舉出適合下列條件之物澧各-杠
條件
(Q) 有畀華現象
(C) 不含氧之氧化劑
[BandYthisṛckrefully:
Last Saturday, was ̃Tom's DAUGHERY ATA*mother'arranged "n"birthday" party for him. Tom invited John,Roze,uary and Jim to his birthday party,they were his good friMds.They aerivad at. Tek's house at 4 o'clock Each of them had a birthday present for Tou.Mary boughs atory book for Tom because he liked to read interesting stories.
Rose bought & box of chocolates for Tou.daha and Jiu together bought one present for tom.They did not allow fan to see their preseat until the party ended.sut they told Tom that it would he very useful to him
boo be wanted to watch the ships at the 'sus.
keanwhile,Tom's mother laid a birthday cake on the table,It had twelve candles on it.Tem took a deep breath and blew the chadies.aut. Then his mother helped him to divide the sake among themselves: Choose the correct answer. Write the annbar of the answer in the aDECE; «)Tom's mother arranged a party for Tou because,
"i.it was her birthday
2.it was Tow'a birthdaj
3.it was a holiday
Tom's mother loved Tom
b)How many people were invited to Tos'a benzer.
I.three
3.ya
2. four
They were invites because
they bought presents for Tanj
2.Ton's mother liked them
3. they were good pupils
..they were Ton's good friends,
(a)mury bought a story book for Tan hozzáán
Tom liked to read books.
2.Tom was a diligent pupil,
Tom liked to read stories
1.Ton did not like anything else.
2.wleven years old
a pair of spectac
3.twelve years old 4.thirteen years oli
4. telescape
17 took a deep breath because
Behe was hungry:
he bad to blow the candles out. 4.he did not like the candles
物墮
•NHCl
(b)
見光髮黑
(d) 溶於水獲大热
H. SOG
by Brought
in the past tense
(七) 溶於水温度降低.
NH. Cl
is the past tense of
(2)
Bead this carefully
Mra.Brava at breakfeat
冩出下列を物頂え顔色
"What are we going to do
en Sunday..
無水硫酸
白色
"Let's go fishing, fumid Jack
仙丹—《
6)硫佰鋅
(d) 高錳酸鉀一
That do you on vako te
Brown.
一九六五題預習車欄
化學科 (十五)
Salt
Ammonium chloridei
Ammonium sulphate
Antonium nitrate:
CHEMISTRY
王錦釗
Used as an electrolpta in dry cells and Lechanche' cells, and as a flux in soldering.
Used as a fertiliser.
Used as a fertiliser and to make explosive 1,
ane action of ammonia on "anhydrite" or native calcium sulphate, gives a cheap process for the manufacture of ammonium sulphate The calelum sulphate is suspended in water in which, ammonia hes been dissolved, and the suspension 19 treated with carbon dioxide, Calcium carbonate ́la precipitated and - amondum sulphate 1s obtained in' ¡solution.
G350, 6,0 2NH, + CO,
咋
(b) (L) Nitrogen is obtained Trom ammonia. by oxidation of ammorius,
"When ammonia (gas) is passed over heated cupric oxide, the cuprat
oxide will oxidise the ammonia to nitrogen.
2H +
ران ناز
(1) Nitric acid is prepared from ammonia by the catalytic oxidat?. of ammonia with oxygen.
When a mixture of ammonia and oxygen is passed over platárium
(catalysi)heated to 900°C, nitric oxide is formed of
视
nitric oxide
The nitric oxide is the rapidly cooled, and is mixed with more
to form nitrogen dioxide:
ZNU
Be nitrogen dioxide, with still more air, is passed into not water,
et solution of nitric acid is produced.
(4)過氧化氮
「以化學式表示下列各物度热分解的生成物(篡填完)
成方程式)
(a) Kolos
(b) Pb(NO3)2
(C) Ca(HCO)z.
(d) NH4-NO-
∙CaCO3, H2OF & CO2
生成
生成:
PbQ Nh to Or
(e) NH Cl
生成 生成 生成
H2ON2O
NHz 和HCl
7.填-
下表:
(Q)
[ 分子式 NaClO.
(b) Na2CO3-10 H2O
化學名稱 次露酸味 碗酸钠结晶 硝酸鈣
普通名稱
茄凡爾水 洗濯苏打
(d) Si.c.
金剛砂
Me Chr
氯化鎂
苦汁:
(C) Ca(NO1).
試描述及解釋下列化学系化之過程:
(a)將硝酸鋼放在實驗管内加热
(b)付鈣放在水中
IC;氯水在陽光下曝晒。
將硝酸銅放在實驗管内加热後,則綠色硝鹃 “銅晶体,初溶解為綠色的液体,继有紅棕色 之過氧化氮买生色之氧放出,(能使木條飲 爐復燃)殘留於實驗管內者,乃黑色氧化銅 2Cu(NG) 2c0+4NO2+02. 將鈣擭放柊K,則鈣立即異水作用:夜出範 氣,且生成氯氧化鈣,能使紅色石蕊試 纸度為蓝色,呈鹼性反應
Q+2H20 → Ca(OH)2 + H2↑
氯水在陽光下曝晒梭,其顔色即消失,因為 氯水中之次氯酸分解成氯化氫氧之故 Hio+Cli
2HCLO
HCl+HCLO
-2HCl+O2↑
「以最简单方法监别下列各组物资
Q)氧與與氧
(紅)硝酸與王水
(2)分别以碘化釺微
民敬入此二瓶氣 体中,若這試紙,著為藍色則為真氣,如包装 化,使是氧
(b)分别以金放入此=瓶液体中,若能使金溶
解者,便是王水,黑麦化者信是硝酸
"Can we go to the
"Look at those lack clouds, "anid Mr.Brown,
"Never mind, we can shelter unmewhere if it rains. "naid Mrs.Brown.
Choose the correct answer from the brackets.arite it in the space, {a}It was(konday morning)(Souday morning) (Sunday afternoon) (Saturday afternoon)
(b)The Browns were having their (lunch) (kom)
supper) (broakfast,
tc/The browns 11amaay decid.toke
the cinema fish)(ania) (plenio) (4)Mr.Brown was afraid that it would
______*(be windy)(rain)(be sunny) (be tạo cos
(four)(fivestaiz; (sevan);
*Let's* ätände for
10 完成及平衡下列各方程式)
a) cost Mg
ab & Cr2 O2 +H.S04+ HiS:
15. HBr+ Mn Oz
(d) AgBrt Nex S2 O2-
4+N&OH-
(NH4)2S04+
答:{a} CO+2 Mg2.m40+C
b
Ka Cr2 O2+4 H = Sout3H4 5 →→ K1 Sou+ Crs(SQ) + 7H1O+35)
(C) 4 H Brt Mx Or Mabry +2 Hi0t Br. 1
(d) Ag Brt Nex Sala-
- Na Ag S2 Os + Na Br
(e) (NH4)2 504 + 2 Na OH-
乙部:
第十五次預習問題
1Ne=S9+2H2O+2NHS
11. 試述過氧化氮在實驗室之製法(附固)及其主要
.性填
12試述煤氣,黄生爐煤氣,吸水煤氣之製法
13 學出五對氧化劑及還原劑,並用反應式表明乳
4今有溶液一杯,試以最簡之才法判定其為者
飽和溶液,飽和溶液抑過他和落谁
3,自磷開始:(A)在空氣中燃燒
(6)生成氧化物溶於水:
JC)所傳正磷酸加氫氧化鈉. 用才程式表明以上各項之麦化。
15.从70.2元之碳酸鈣加热而使之分解,在温度
7°C及壓力720mm下,所得之二氧化碳想有 体積若干升?
以2N单酸鈉之硫酸性溶液100C.C.滴定高 鎰酸年之濃度,所用高錳酸鉀溶液為80C.C. ̇則其規定濃度為若干?此草酸鈉溶液10C.C.金
有草酸鈉若干克?
(A + * = Na=23; C=12,)
(a) (1) Add fairly strong nitric acid solution (about 50% water, 503
concentrated acid) to some copper turnings until the copper hea completely dissolved. A blue solution of copper nitrate is then
3C安
30μ(NO) + 2N¤↑↑ WRO copper nítrata
The blue solution 1a then heated to dryness. When all the moisture is driven off, green residue, Cu(NO)is left, which will decompose on continued heating, giving off a mixture of gases, nitrogen dioxide NO, and oxygen, 02, and leaving a black residus, Cu, The residue is heaved until a constant weight is obtained,
12Cu(NO3)2
20ɑ0 + 4NoO2T + ..
(11) To prepare a sample of curple chloride, take some of the cu oxide obtained in (a) and add hydrochloric acid until all the cuprto xids has disappeared. The two substances neutralise each other, to give a blue solution of cupric chloride.
Cu + 2801
Crystals of cubric chloride may be obtained by evaporating the lution to dryness..
(iii) When caustic soda solution is added to some of the blue solur? From (b), a blue precipitate of copper hydroxide will be obtained; which is insoluble in excess of caustic soda.
.
2NAC1+ Cu(OH)
The blue precipitate is separated from the rest of the solution
by filtration.
Cu50,51,0
64 + 32 4 36 x 4 + 5 (1 x 2 +16)
64 +32 + 64 † 90
250
ght of
„158,0 that can be obtained from 64 en, of copper » Dáð um.).
Questions for next week-.
12 (4) Name. (1) a very soluble gas giving an alkaline solution in water;
(1) a very soluble gan giving an acidic:eolution din water: (111) a neutral oxide;
LAM
(iv) a solid which on heating evolves carbon dioxide
(v) a solid which on beating evolves oxygen.
(a) Among substances that occur naturally, nams, without repetitioni,
(1) four gaseous elementar
(ii)'to gaseous. compounds;
(111) two solid, non-metallin elementa;:
(i) two metals; -
(v) two soluble saltap.
(vi) to insoluble salts;
(vii) two metal metal carbonates;
vill) three oxides;
(ix) two naturally occurring chemical reactions.)
2. Give the formula of three of the following crystalline substances!
copper sulphate, potassium nitrata, calcium carbonate, ferrous sulphate,' and sodium carbonate.
Choose one of these compounds and describe how you would reduce it do the metal,
...
In the case or another of these compounds, give and explain
(1) an adequate test for the baste and for the metale radicalti (11) the affect of heatina the substance..