Coloured Ionic Compounds in the Real World: chem105 Summer 2017 Class 1 by kalarani https://padlet.com/kalarani_vellas/mqqhfnau4hn7 Use the following padlet as a platform to post your answer. I have posted my choice as an e.g. All salts are ionic compounds. Some are white (contain only main group elements) while others are coloured (contain transition elements). en-us 2017-07-05 08:21:32 UTC 2024-10-16 15:19:45 UTC hello@padlet.com Ms. Kala kalarani_vellas https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178087891 Amethyst is a precious stone used as jewellery.  It is sand (Silicon dioxide). Its purple coloring is caused by 
manganese (VII) compounds. ]]> 2017-07-05 08:21:32 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178087891 Tan Jame Ming tanjameming9 https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178104179 Hematite (Iron(III) oxide) is a gemstone which Chinese used it for ''Feng Shui''. The colour of hematite is black because Limonite (hydrated iron(III) oxide) loss water .

]]> 2017-07-05 12:28:52 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178104179 Guna https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178104826 Emerald is a precious stone used in jewellery. The distinct colour is caused by chromium(III) ions replacing aluminium in some location in the structure.]]> 2017-07-05 12:39:50 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178104826 Tan Jia Hui https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178106650 Rubyis a gemstone commonly found in jewelry. It is mainly made from corundum(Aluminium oxide). It's red coloring is  caused by the chromium(iii) impurities]]> 2017-07-05 13:06:24 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178106650 Michael Chieng Sun pou409 https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178111029 Chalcanthite is common in arid regions due to its ready solubility and is used as jewellery. It is also known as copper(II)sulphate pentahydrate. It is blue in colour because of the presence of copper(II)ions.

]]> 2017-07-05 14:00:33 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178111029 Racheal Lavinia Dawson https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178117994 Potassium dichromate (K2Cr2O7) is a crystalline ionic solid with a very bright, red-orange color. It is used as an ingredient in cement in which it retards the setting of the mixture and improves its density and texture.

]]> 2017-07-05 15:27:49 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178117994 Dhruv Soni https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178125584 Strontium Nitrate(Sr(NO3)2
Is a type of  pyrotechnic colorant which causes a flame to burn with a particular color,specifically red. It is used in fire works and road flares, burning with a red light. This is due to the presence of strontium(II) ion considering the color of the flame is dependent on the cation,with the anion of the salt having little effect.The anion however does affect the temperature of the flame

      
]]> 2017-07-05 17:25:00 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178125584 Park Jin Soo https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178156147 Saltpeter is a white ionic compound, which commonly use in manufacturing of fertilizers and gunpowder. It is also known as potassium nitrate (KNO3) , an alkali metal nitrate]]> 2017-07-06 03:19:14 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178156147 Klarissa Khong klarissakhong https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178158406 Sapphire is made from aluminium oxide, Al2O3.
The intense blue of the sapphire is caused by the addition of titanium (iii) ions and iron (iii) ions to the mineral corundum  (crystalline form of aluminium oxide).
Sapphire is commonly used in jewelry but is also used in infrared components, high-durability windows and wristwatch crystals due to its’ remarkable hardness.

]]> 2017-07-06 04:03:32 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178158406 Faisal Fazlu Khan https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178178732  Sodium chromate (Na2CrO4). It is yellow in colour. It is used as a corrosion inhibitor in the petroleum industry. It is also a dyeing auxiliary in the textile industry and a wood preservative. 
It is a diagnostic pharmaceutical in determining red blood cell volume.

]]> 2017-07-06 09:46:23 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178178732 Ng Zheng Yao (Augustus) https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178185061 Anhydrous Cobalt(II)Chloride contain cobalt and chlorine, with the formula of CoCl2. It is sky blue in colour. When Anhydrous Cobalt(II)Chloride come in contact with water it will turn to purple colour. Due to the colour change Anhydrous Cobalt(II)Chloride is used as an indicator for the presence of water.   ]]> 2017-07-06 11:21:39 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178185061 Shau Wen Zhe https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178223642 Lead(II)iodide(PbI2).It is yellow colour when it is cold but it is brown colour when it is being heated.It contain lead and iodine.The compound currently has a few specialized applications, such as the manufacture solar cell and X-ray and gamma ray detectors.]]> 2017-07-06 23:14:10 UTC https://padlet.com/kalarani_vellas/mqqhfnau4hn7/wish/178223642