问题 选择题

下列关于配制0.1mol•L-1 KNO3溶液的说法中,错误的是(  )

A.将1.01g KNO3溶于100mL水配制而成

B.将5.05g KNO3溶于水配制成500mL水溶液

C.将100mL 0.2 mol•L-1 KNO3溶液加水稀释成200mL

D.将10.1g KNO3溶于水配制成1L水溶液

答案

A、1.01g KNO3的物质的量为

1.01g
101g/mol
=0.01mol,配制0.1mol•L-1 KNO3溶液,溶液的体积为
0.01mol
0.1mol/L
=0.1L=100mL,不是溶剂水的体积,故A错误;

B、5.05g KNO3KNO3的物质的量为

5.05g
101g/mol
=0.05mol,配制成500mL溶液,溶液浓度为
0.05mol
0.5L
=0.1mol/L,故B正确;

C、稀释前后溶质硝酸钾的物质的量不变,令稀释后浓度为c,则:100mL×0.2 mol•L-1=200mL×c,解得c=0.1mol/L,故C正确;

D、10.1g KNO3的物质的量为

10.1g
101g/mol
=0.1mol,溶于水配制成1L水溶液,溶液浓度为
0.1mol
1L
=0.1mol/L,故D正确;

故选A.

阅读理解

阅读理解。

     Jane Austen, a famous English writer, was born at Steventon, Hampshire, on December 16, 1775, and died

on July 18, 1817. She began writing early in life, although the prejudices of her times forced her to have her

books published anonymously ( 匿名 ).

     But Jane Austen is perhaps the best known and best loved of Bath's many famous local people and visitors.

She paid two long visits here during the last five years of the eighteenth century and from 1801 to 1806, Bath

was her home. Her deep knowledge of the city is fully seen in two of her novels, Northanger Abbey and

Persuasion, which are largely set in Bath. The city is still very much as Jane Austen knew it, keeping in its

streets and public buildings the well-ordered world that she described so well in her novels. Now the pleasure

of learning Jane Austen's Bath can be enhanced (增强) by visiting the Jane Austen Centre in Gay Street. Here,

in a Georgian town house in the heart of the city, you can find out more about Bath in Jane Austen's time and

the importance of Bath in her life and work.

     The Centre has been set up with the help and guidance of members of the Jane Austen Society. After your

visit to the Centre, you can look round the attractive shop, which offers a huge collection of Jane Austen

related books, cards and many specially designed gifts. Jane Austen quizzes are offered to keep the children

busy.

     You can also have walking tours of Jane Austen's Bath, which is a great way to find out more about Jane

Austen and discover the wonderful Georgian city of Bath. The tour lasts about one and a half hours. The

experienced guides will take you to the places where Jane lived, walked and shopped.

1. Jane Austen paid two long visits to Bath ______.

A. in her early twenties

B. in her early teens

C. in her late twenties

D. in her late teens

2. What can we learn about Bath from the passage?

A. Bath has greatly changed since Jane Austen's death.

B. The city has changed as much as Jane Austen knew it.

C. Bath remains almost the same as in Jane Austen's time.

D. No changes have taken place in Bath since Jane Austen's time.

3.The author writes this passage in order to ______.

A. attract readers to visit the city of Bath

B. ask readers to buy Austen's books

C. tell readers about Jane Austen's experience

D. give a brief introduction to the Jane Austen Society

4. It takes you about one and a half hours ______.

A. to get to the Jane Austen Centre in Gay Street

B. to buy Jane Austen related books, cards and gifts

C. to find a guide to take you to the Centre

D. to look around the city of Bath on foot

单项选择题