test for cations and their results

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Chemistry

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8 Terms

1
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Iron(II)
Green precipitate,insoluble in excess
Green precipitate,insoluble in excess
2
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Iron(III)
Red brown,insoluble in excess
Red brown,insoluble in excess
3
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Zinc

White ppt,soluble in excess giving colourless solution

<p>White <mark data-color="#FCE7D2">ppt</mark>,soluble in excess giving colourless solution</p>
4
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Ammonium(in sodium hydroxide)
produce ammonia gas
5
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Calcium(in aqueous sodium hydroxide + ammonia solution)
* White ppt, insoluble in excess(sodium hydroxide)

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* No/little white ppt(Ammonia)
* White ppt, insoluble in excess(sodium hydroxide) \ * No/little white ppt(Ammonia)
6
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Chromium(in aqueous sodium hydroxide + ammonia solution)
* Green ppt,soluble in excess(Sodium hydroxide)

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* Grey-green,insoluble in excess(Ammonia)
* Green ppt,soluble in excess(Sodium hydroxide) \ * Grey-green,insoluble in excess(Ammonia)
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Copper(II) (in aqueous sodium hydroxide + ammonia solution)

  • Light blue ppt,insoluble in excess(Sodium hydroxide)

  • Light blue ppt,soluble in excess giving dark blue solution

<ul><li><p>Light blue ppt,insoluble in excess(Sodium hydroxide)</p><p></p></li><li><p>Light blue ppt,soluble in excess giving dark blue solution</p></li></ul>
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Aluminium
* white ppt,soluble in excess giving colourless solution(Sodium hydroxide)

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* White ppt,insoluble in excess
* white ppt,soluble in excess giving colourless solution(Sodium hydroxide) \ * White ppt,insoluble in excess