再問= ="

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迪
Username: 981001

Registered: 04-2003
Posted on Wednesday, April 23, 2003 - 11:52 pm:   
溶性along group7 係 decrease or increase
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小畫家
Username: 981039

Registered: 04-2003
Posted on Thursday, April 24, 2003 - 01:28 pm:   
乜你唔見左本chem書???
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迪
Username: 981001

Registered: 04-2003
Posted on Thursday, April 24, 2003 - 11:56 pm:   
umm...請先答我吧
另
what is addition ploymer?
And
soapless detergent is made from petroleum add NaOH
咁是不是=alkane + NaOH 出soapless detergent
咁條chemical equation 係乜?
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Chio U Kim
Username: cuk

Registered: 04-2003
Posted on Friday, April 25, 2003 - 09:59 am:   
Production of soapless detergents involves two steps :

1. aromatic hydrocarbon (NOT alkane!) + H2SO4 ® sulphonic acid

2. sulphonic acid + NaOH ® soapless detergent

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