Chem 問題-Metals

2009-05-02 2:53 am

1How can you prove that sulphur dioxide are acidic??
2Name two metals that make up the solder alloy.
3Why is solder more useful in joining metal parts than the metals you gave in Q.2
4Briefly describe how solder can be made from the pure metals
5What is steel made up of?
6Name two industries that use steel extensively
7Stainless steel is commonly used in making kitchenware.why?

回答 (1)

老爺子

2009-05-02 3:22 am

✔ 最佳答案

1.
Sulphur dioxide can change wet blue litmus paper to red.
(Sulphur dioxide cannot bleach litmus.)

2.
lead and tin

3.
Solder has a lower melting point than those of lead and tin. The melted solder joins metal parts when it is solidified.

4.
Melted lead and melted tin are mixed together, and the mixture is then solidified to make the alloy (solder).

5.
Steel is an alloy that is made up of iron and a small amount of carbon.

6.
Vehicles manufacture, ships manufacture, building construction, etc.

7.
Kitchen is moist, and thus iron rusts readily. If kitchemware is made of stainless steel, rusting can be prevented.
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