海事處購電腦軟件
助成立船舶登記處
以其他行政席立法程中:東提物有所值,並可提 「呜電腦程式,配因此對政府及用家來
港新船租登和毒的麻軟件安裝簽署合約, S SYSTEMS LTD. 主席馬他為香
1990 中學會考預習專欄
明道出版社
MILL & DALE PRESS
Unit 17:Simple Tests of some codamon
Cations, Na, K, Li*, Ca2+, Mg2+, A13+
報日僑羊
迎歡受最動活
Chemistry(29}
物人川山術藝影劇 日六廿月三
力支持登慈公司。 點七二,此外賣路银行已出現在千萬元
·分之十二點五,維格實業公司百分之四十二 葉資財售包括溫哥華第一城市財務公司百
漢傑通訊) 片中心是用玻璃萦頂的,並設有一 心耗一共八但完
湘蛋活城」計劃在加拿大 (本刊駐加拿大記者姚
片場,規模宏大,
队中建案一阵大荷里活氆球片场型,內泳池,一固步醒和水上樂固,一個冬季奇景 奇瑞谁在史丹心牛仔公園附近:芄道交爲境地帶,内有一個會議中心,一個黃 千座許的兩個劇决和一座也早期牛仔城背景的 *另外又灯 一座五百房間的高級酒店,一天 的好設備,以悦每年均可拍攝冬季最新之用
世界父将有一些全新的「
不過香港悷加革大苻說、牴台及傳第三重站可瞬影五十小時的獨立製作。
·傳達相當整個計劃是會職造的,又預計五年 全部完成,可以製造八千個就業機會 *投安集團之一,史達迪劇院的創辦人史古
新聞
大小。舞。台
·家一版不振,國民再 主義的增路上使 因爲性魄地走上本均
不但没有得到舒展, 野不堪,國民的朝 步,輕民生活依然窮 點,快确搜上有美術的成果。 歎不已,同時演員方面也要得不少的啓迎。
爲國冷民的禍?我們還誠所血來爭取1 上相懷民警和巧妙。每次在排錬堂中郑樾我們感覺到瞒,是安撫中均主義下的這民。作家的良知那晝去了,初 郝有良好的效果。希噻參與演出的演戲,都-
分掌握這 需要丝天求用寫成就爆肺的一面,將書捕集成慢懟 + 點。于這點,對演员演技的自我鍛煉時,可能發握了·腾村成濃厚的郑土氣息,將雨水都沒有一洒的地方而 反而還受到重蕉的酷制。苦我們的附年是否還有當年一次度入赛他與阿胖的裸晰,其令人霋三區。 此外,另一項令人盤節祔賞是剥作者在對的處理學家,劉作家高度藝術的岚劃而成大作,其實在抱神上 雨下,性格的描寫,生動和製出。澄帶出人性翩腻的刻 大作,將文育寫成純槐得可愛的人物,將整度贫困的 範例,人均不多,但各有强烈的性挤,在動會的政治主髙:全得出來給人家繼而且又獲得過乜的獎閲点的 「野玫瑰」在劃份技術上也提供了一般優秀作品的均以後的結果,在諸多意識形態有高度評價的出版部作 將没有忠愛自由的少女寫成無限眞,當然鏟都通类
可平均主義是「一個景區的法忿」吧-但事奉
·他得把貧窮、落後,若王、底無視爲中國團實车到文
灣仔文康體制鐘的一種新埋班的青年酎发選商氓∫脑市场去錢,中國作案「醞
{c}Fe2+/Fe3+; With ammonium thiosulphate solution (NH SCN); FeÖ*tag), gives a colourless.
solution whereas Fe (aq) gives a blood-red coloration.
IV. Tests: for Anions in Solid Substances
Pam2to Fe2t, fear, cut, Ngz, (mg*)
· Effect of Heating "Anton
Carbonate Co Co, cvolved. Steam. may be (Except those evolved.
faNa and CD"(s)O(s)+CO(日)
With conc. Hy50,
Cog evolved.
With dilute HCT
Cayevared with steam. |21C9 10 200g)
CO, evolved.
Effervescences, CO, evolved.
CO2 (3)+2H20(4)+CO, {g}|CO2-
|_ 2 ̃(aq)+2Hx(aq)
~~~~~H_0(e)+C), (3)
Effervescences CO, evolved.
→H20(21+CO2 {g}
HCO, (S)+(aq)
Anions: 50, 2, 50, 2, NO, CO2, HCU, C1, Br", { ́,
3. Solubility Rules of Corman Ionic Salts in. Mater.
1. All the salts of potassium (K"), sodium (Na) and ammonium (NH,*) are soluble.
2. All the nitrates are soluble.
3. All acid, salts are soluble.
4. All halides are soluble except silver halides and lead(II) halides but lead(11) chloride is very
. soluble in hot water}..
5. All sulphates are soluble except barium sulphate (BaSO ), Teauffe insulphate (PbS0 ) and calcium.
* sulphate (Cas0g) (which is actually slightly soluble.}
6. All carbonates are insoluble except those of K, Na*
II.Flame Tests
Colour Flame
Scarlet
Bright yellow
Lilac (on Crimson through cobalt blue glass).
Ion Present
Apple green.
Bluish-green
O
lodide I
White dense fumes of 50,
unite funies of HC1.
C1 (s)+H, 50, (2)
White fumes of her, mixed with orale or brown Br 【 vapour
Br(g) +H$0, (s) |2HBr (0) »H,50, (2)
「Dark-grey solid ], and/or
violet vapour
legg smell of fly
21 (s)+31-50
——— 1 2 ( 5 ) +2H2 0¥2302(g)
Bad-
Adding Aqueous Ammonia
Adding Aqueous Sodium Hydroxide
Sulphate:
Hy is detected on
one warming.
(on Sag) sometimes. evalved..
White opt.
Sulphite
"fl.Tests for Catlons in queous Solutions.
tation
No reaction.
維特文•
其推廣人口
韓古通今,
登抔與 澆沬竹石圖
[的貘文「 文章」中,进位中共大十于兹未遵運厄運,他和吳 海湘约石画软时烘」一文-分堂家祥用之所能 鄧先生開演澅教古文物之舉,一時引楼住磊-低 鳥健是為,否定習前使用體不良坤拓從米先生的學問 *題有「軾莘老作」五宇(圖卷長更在代短段文字, 湖水兹山,葉悅深遠,倘送之網撲人。引入注的是,直 順醫書卷,畫面上一片上坡,兩塊石頭,經叢絳攸;左右 章考 擴-
分,題,令人帶蹴爲蘇钴之作無炉, 文迎同業卷發妻在一九六二年期「人民報上, 作之其僞產生連度典焯,故用了先生的考文 理 引夜話」卷人頗見跌 海省與其常牀生平,因們妹子
術·扔叔谍安民闊,甚至扰皮 有一恊鼠别短靴的問題。在西方,至今對護 分奇的心 時术南創而否定了,必然術使一些懒毡連城的惬ㄓ装一 一個民族,民間的收藏文物的摄程中,说魚龍混!! 一橫流傳儿百年的古蛋珍品嗽不被盛沒,越需要有一批 # 烨折如果有知,當爲品獲得與想舘管而含笑九泉, 從斐東坡的“谍湃竹石谧」好低的陡案中,令人感到 畢搛現科中國美術館收,說是邓拓大A了一塊稍甜的 小組對【竹糸團一行区醫研究,副是東坡實逊烶 一九八年夏,中國著名畫家組成的國務院中國古董巽记·
Mg
Whitespot.
Mg**(aq) + 20H(aq) → Ma(OH)(s) White ppt, soluble in excess NH2faq). Zn&*Laq) + 20H(aq) ---- Zn{OH},{s} 2n{DH},{s} + 4NH (aq) —Zn(NH;} ̧2+
A
White ppt.
FA2+
| Al 3+ (aq) ++ *30H" (aq) →→ Al(OH)3(s)
Pale green opt.. turning reddish-brown on Istanding in air due to formation of (ron{I]1】 Jhydroxide.
Fe2+(aq) + 20H (ag)--Fe(OH),(s)
4Fa(OH)2ts) + 3 + 2H2O → 4Fe(OH}g{s)
Reddish-brown.ppt.
Fe(aq) + 30H(aq)→→Fe{OH)g($}
阳
white, gelatinous ppt..
力
||Pb2*(aq) + 2011 (an)--Pb(OH), {s}
Mg2+(aq) + 204 (aq)~~~Mg(OH)
white, gelationous ppt., soluble in excess NaOH(aq):
zn2(aq) + 2011 (40) →→→ Zn(OH);(s) Zn(OH)(s) + 2NaOH(aq) ~~~2Na*(aq)+Zn(OH) _ 2-
White, gelatinous ppt., soluble in excess
aOH (aq)
A1*(aq) + 30H(aq)—AI(OH),(5)· Al(OH)g(s) + OH(aq)----Al(OH)x(ag)
Pale green ppt., turning reddish-brown on standing in air due to Tormation of Fron(III) hydroxide.
Fe(aq) + 204 (aq)—Fe(OH),(s) #Fe(OH)2(5) + 0 + 2H20—4Fe(OH)3(5)
Reddish-brown ppt.
Fel*{aq} + 30H*{aq}~Fe(OH)g{s)
White, gelatinous ppt., soluble in excess
Pb2+(aq) Pa(OH)2 (s)
Pb(OH)2(5), +-2011" (aq)—— 2Pb(OH) (aq)
Blue ppt.. soluble in excess NH (aa), to form
Blue ppt., turning black on heating.
ff fu2t(aq) + 20H (aq) - CutOH)z{5}
a deep-blue solution.
cu(aq) + 208 (89) — Cu(OH), (5).
Cu(OH),(s)+4NI (aq) →→→ Gu{N}; } ̧2*{\sq)+20H°(aq) | Cu(OH)2(s)-- CuO{s} + H2O
Ari
: Darkwargan.pat., solutile in excess NHg(aq)
black
Dark-brown ppt.
Nitrate NO
Group I metal nitrates: 10, evolved.
2ND (5) — 2ND (s)+0,(9) 「 other metal nitrates:
02 and brown fumes (NO2). kevolved.
SO, evolvad. 「SOg($)+2H*(aq)
__→→→ H20(e)+50,(g)
HNO, vapour and
reddish-brown fumes of NO, evolved". NO, "{5}+H2 SU2 [2]
{$) *OSH+(9) ONH---
4ND_{q}+02{g}+202 ̄(s)
V. Test for Anions in Aqueous Solutions
·Andan
CO2
ANO(9)
~_~2H,2 0(2)+4NO2 {g}+02 {q}
Adding BaCl2(aq), followed by dil HCI
White ppt. of BuCD; soluble in di) HC1, [Cog2-tay)+Ba2+(aq)---- Bacdgts). {BaCO(s)+24(aq)~~ Ba2+(aq) +1,0(2)+CQ (9)
HCO, White ppt. of vaco,; soluble in d11 Cit),
21C03 (89)+Bn2* (ng) --- VaCO(S)+H_O(@)+CQ_{y}
T
50,white put, of Baso, insoluble in HCl.
\su ?{aq)+Ba?*{aq}+ BaS)g(s)
:$03-
150, evolved on warming.
[S0_^~(5)+20=(80)
~_~_~_~N20(# (+50, {9}
Adding AgNO3(aq), followed by dil HNO White ppt. of Ag2C03; soluble in HNO3. [C0g?(aq)+2Aq*(aq) → Ag,COy(s)
| Ag2C0 ̧ (s) + 2H (aq) —— 2Ag*(aq) +H_D{£)+CO_{g}
[White opt. of au-COg; soluble r HNO3
2000, (aq)+2Ag*(aq)—AUCO2{s}+H2O[8I+CO2{g}
white ppt. of Agci; lesoluble in HNO C1"(aq)+Ag*(aq)--- AgC1(s)
Pale-yellow ppt. of AgBr; insoluble in HNO3. {Br" (aq) +Ay*{aq}~+ AgĦr(s)
Bright yellow ppt, of Agl; insoluble in #NO,, | I"(aq)+Ag*(aq) →→→ ADI(s)
N.8.(1) £i*, k*, Na*, Ca2* and Ba2* give no precipitate with dil aqueous NH, or dil aquenous Nabi.
(21 Specific Tests.
(b)Ag
·atving a white precipitate of leadfil) chloride with aqueous chloride 1ons: precipitate insoluble in cold water but very soluble in hot water. Pb2+(aq) + ()"(aq) PLC12(s)
Glying a white precipitate of silver chloride with aqueous chloride ions; precipitate Insoluble in dilute acid but soluble in aqueous ammonia. AgCl (s) + 2NH3(34) -- Ay{M});}2*(aq) +C}"{aq)
White upt, uf Ba50g; soluble in HCT, So,2(aq)+Ba2+(aq)=8@50g($)
|| B450; (5)=2H*(@q1 --- Ba2* {@q}+H2O{u} +SO2{g}
By Brown-ring test - Mix the nitrate solution with some freshly-prepared Fe50, solution in
a test-tube and then add conc HS0, carefully down the side of the test-tube. A brown ring appears
Page 35Page 36
豪華小巴即將上市
影攝 日六本月三年午庚腦夏
No comments yet.
Private notes are available after approval.