问题 填空题

(10分)A、B、C、 D四种溶液分别是NaOH溶液、氨水、 CH3COOH溶液、盐酸中的一种。常温下:

①浓度均为0.1mol·L-1的A和C溶液,pH:A<C<7;

②将1 L pH=3的A溶液分别与0.001mol·L-1 xL B溶液、0.001mol·L-1  yL D溶液充分反应至中性,x、y大小关系为: y<x;

回答下列问题:

(1)D是                      (填化学式)溶液;                                                      

(2)②中1LpH=3的A溶液与0.001mol·L-1 xL B溶液充分反应至中性,所得溶液中各种离子的物质的量浓度由大到小的顺序为                                  

(3)常温下,等体积且等物质的量浓度的C溶液和D溶液充分混合后所得溶液的pH

       7(填“>”、“<”或“=”),用离子方程式解释其原因                

(4)向pH相同且等体积的两份溶液A和C中,分别投入质量不同的锌粉反应,若放出氢气的质量相同,则下列说法正确的是                  (填写序号)。

①开始反应时的速率A>C                ②反应所需要的时间C>A 

③参加反应的锌粉物质的量A="C          " ④A溶液里有锌粉剩余

答案

(1)NaOH (2分)                                     

(2)c(NH4)= c(Cl)> c(H)= c(OH)   (2分)

(3)>(1分)      CH3COO+ H2 CH3COOH+ OH     (3分)

(4)③④(2分)   

推断题
阅读理解

Bayfield Shopping Coupons (赠券)
1. Six Hours Free Parking
If you spend $ 100 or more in our stores you will receive six hours of free parking. When you have spent $100 or more, just take this coupon and your receipt to the customer service desk on level 4. They will stamp your parking ticket to allow 6 hours of free parking.
Offer here until November 14.
2. Win a $1000 CD Collection
Win your choice of $1000 worth of CDs from JB Music Store. Just buy any two CDs and your name will go into the competition. Select your own prize from our wide variety of rock, pop, jazz and classical music.
Competition ends November 14. Prize drawn on November 21.
Check store for more information
3. Buy One, Get One Free
Buy one shirt or tie at Daniel’s Menswear, and get another shirt or tie of the same value free.
Choose from any of our dress shirts and we will give you another one at no cost.
Hurry! Offer ends November 14.
Offer limited to one per customer.
4. 10% Off
Present this coupon at The Book Store to get a 10% discount on any books you buy. We have lots of books to choose from, including children’s books, novels, travel guides, and science works. You are sure to find something that you will enjoy. Shop now for Christmas, we have a large quantity of toys as gifts for you and avoid the rush!
Offer here until November 14
5. Half-price Movie Tickets
Buy any full-price movie ticket on Tuesdays or Wednesdays, and you can buy a second tickets for a friend for only half price. The latest movies are here, being shown in one of our five theaters at Bayfield Shopping Center.
Offer here through December 1, Limit on per customer.
6. Free Soft Drink
Buy any meal for at least $6 at Mike’s Café, and receive a free soft drink. We serve the best food in the Shopping Center. Come in and try our delicious meals and our excellent service. You won’t be disappointed!
Free soft drink offer ends November 14.
1. What are these ads for?
A. Food you can order for delivery.     B. Places to go on vacation.
C. Special offers at a shopping center.      D. Things on sale in a big store.
2. Which of the following is true according to the ads?
A. Spending $50 means 3 hours of free parking.
B. One person can buy 5 tickets for the price of three.
C. After buying two CDs, you can get another two CDs for free.
D. At Mike’s Café, people can get a free drink after spending $6.
3. Which of the following is NOT mentioned at this mall?
A. Clothes store.       B. Music store.          C. Restaurant.    D. Toy store.
4. We can know from this passage ________.
A. there is more than on theater in the center.
B. if you buy a book there, you may pay less than half the price.
C. you may get a free on if you buy a shirt, or a tie, or a pair of shoes.
D. you won’t get a free soft drink unless you spend more than 10 dollars on the meal.