ODWS icon

The Open Door Web Site
HOMEPAGE BIOLOGY PHYSICS ELECTRONICS HISTORY HISTORY OF SCI & TECH MATH STUDIES LEARNING FRENCH STUDY GUIDE  PHOTO GALLERY
CHEMISTRY HOMEPAGE TOPIC CHAPTERS PHYSICAL SCIENCE LABORATORY WORK 

 

 

Navigation

Lithium homepage
Sodium HP
Potassium HP
Rubidium HP
Caesium HP
Francium HP

 

Group 1 : The Alkali Metals

Reactions
The Alkali Metals
The Alkali Metals : Metal Hydroxides

Visual Chemistry Homepage : The Periodic Table

 

Tutorials

Atomic Structure
Electrovalent Bonding
Covalent Bonding
Water
Transition Metals
Metal or Non-metal?
Noble Gases

 

General

Element Identification Timeline

VISUAL CHEMISTRY

Custom Search

Group 1 : The Alkali Metals : Precipitate Reactions

Alkali metal hydroxides can be used to test the identity of metals in certain salts.

Equation 1

The colour of the precipitate will help identify the metal :

  • Calcium hydroxide is soluble; no precipitate is formed

  • Copper hydroxide forms a blue precipitate

  • Iron II hydroxide forms a green precipitate

  • Iron III hydroxide forms a red-brown precipitate

  • Zinc hydroxide forms a jelly-like, white precipitate

  • Aluminium hydroxide forms a white precipitate that will re-dissolve as the reaction proceeds.

 

1.Sodium hydroxide with calcium sulfate

No precipitate is formed since calcium hydroxide is soluble in water.

Reaction 1

Equation 2

 

2. Sodium hydroxide with iron III chloride

A red-brown precipitate is formed.

Reaction 2

Equation 3

The Open Door Web Site is non-profit making. Your donations help towards the cost of maintaining this free service on-line.

Donate to the Open Door Web Site using PayPal

SITE MAP
WHAT'S NEW?
ABOUT

PRIVACY

COPYRIGHT

SPONSORSHIP

DONATIONS

ADVERTISING

© The Open Door Team 2017
Any questions or problems regarding this site should be addressed to the webmaster

© Shirley Burchill 2017

Hosted By
Web Hosting by HostCentric


SiteLock