问题 填空题

烧碱在空气中久置会变质,写出有关反应的化学方程式______,在部分变质后的物质中,加入足量盐酸,写出有关反应的化学方程式:

______,______.

答案

烧碱是氢氧化钠的俗称,在空气中久置能与空气中的二氧化碳反应生成碳酸钠而变质,反应的化学方程式为2NaOH+CO2═Na2CO3+H2O;部分变质后的物质中含有氢氧化钠和碳酸钠,加入足量盐酸,均能与稀盐酸反应;碳酸钠与稀盐酸反应生成氯化钠、水和二氧化碳,反应的化学方程式为:Na2CO3+2HCl═2NaCl+H2O+CO2↑;氢氧化钠与盐酸反应生成氯化钠和水,反应的化学方程式为:NaOH+HCl═NaCl+H2O.

故答案为:2NaOH+CO2═Na2CO3+H2O;Na2CO3+2HCl═2NaCl+H2O+CO2↑;NaOH+HCl═NaCl+H2O.

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Ad. 1

April fool’s party

On Friday, April 1, Inner Affair goes back to the days of funk! Classic Tunes from the 70’s and 80’s by DJs Den & Sion. 9pm till late.

Tickets: Free entrance for those in costume, otherwise 50 yuan (US$6)

Time/date: 9 pm, April 1

Place: Inner Affair, 1/F Qiankun Dasha, 6 Sanlitun Xiliujie, Chaoyang District

Tel: 8454 0321

Ad. 2

Language in use

Enjoy free inhouse coffee, tea and beer as well as music and dancing. Practice your Chinese, make friends and have fun.

Time/date: 7 to 9 pm, March 25

Place: Language In Use Club, 2/F, Science Fortune Center, 8 Xueqing Lu, north of Xueyuan Lu, Haidian District

Ad. 3

The "worst" party

Organized by ozone productions, the party is set to be "the worst ever", with the lamest music from the 60s, 70s and 80s. Special prizes will be awarded to the worst dressed or for bad fashion sense.

Tickets: Free entrance

Time/date: 9 pm, April 1

Place: Pula Pula, Tianze Lu, Oriental Seven Colours Plaza, Chaoyang District

Tel: 64668575

Ad. 4

La Nuit Francaise

Again on the 2nd Thursday of the month La Nuit Francaise will be held at Le Rendezvous. The monthly event is an opportunity for all French people and everyone interested in France or speaking French to gather together.

The evening features three glasses of wine and canapes for participants and a special exhibition.

Time/date: 7 to 10 pm, April 14

Place: Le Rendezvous, 3 Gongti Beilu, accross from the Pacific Century Plaza, Chaoyang District Tel: 64629110

Ad. 5

Marco V

Dutch DJ Marco V drops by Banana for a gig which is supported by Hong Kong’s DJ Spark.

Marco V has been around for many years, as an inventive, styleblending deejay and a successful and devoted producer. His spinning is energetic, crowdpleasing and never sees an empty dance floor. He was ranked No. 15 in this year’s international DJ MAG DJ Top100.

Tickets: 40 yuan (US$4.80) in advance, 50 yuan (US$6) at the door, both include a free drink

Time/date: 10 pm to 4 am, March 31, April 1

Place: Banana, in the lobby of the Scitech Hotel, 22 Jianwai Dajie, Chaoyang District

Tel: 65283636

小题1: Which of the following is NOT true of Ad. 1 and Ad. 3?

A.The two parties will be held on the same day.

B.The two parties will be held at the same time.

C.The entrance fees of the two parties will not be charged.

D.Some old music will be played at the parties.小题2:Which of the following is intended for the Chinese learners?

A.Marco V.

B.La Nuit Francaise.

C.Language in use.

D.The "worst" party.小题3:We can infer that______.

A.Marco V is a newlyestablished band

B.La Nuit Francaise may be French words

C.the "worst" party will attract a lot of college students

D.you will enjoy free drink at April fool’s party