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Questions and Answers
Qual è le colore del precipitate formate quando on adde NaOH in excesso al cation de zinco?
Qual è le colore del precipitate formate quando on adde CaCl2 al cation de calcio?
Qual è le colore del precipitate formate quando on adde FeCl2 al cation de ferro(II)?
Quale gas produce un colore pallide verd al reagentes?
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Qual es le reaction de sulfure de carbon quando illo es addite al manganese potassic acidificate?
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Qual es le color del precipitate formate quando on adde NaOH in excesso al cation de ferro(III)?
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What color precipitate forms when iron(III) ion reacts with FeCl2?
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When excess NaOH is added to a zinc ion solution, what color precipitate is observed?
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What gas turns damp red litmus paper blue?
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In the presence of Fe(II) ions, what color precipitate forms when ammonia is added in excess?
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When silver nitrate is added to a solution containing Li+ ions, what color precipitate is formed?
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What gas holds a lit splint in the mouth of a test tube to relight it?
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Study Notes
Testes pro Cationes
- Metal cationes se pode identificar per methodo â‘ : adder NaOH e subsequente adder de S04 o NaOH in excesso.
- Sodium (Na+) no produce precipitate.
- Indium (In2+) produce un precipitate blanco con S04.
- Cupro (Cu2+) produce un precipitate azur blau con CuSO4.
- Calcium (Ca2+) produce un precipitate blanco con CaChz.
- Chromo (Cr3+) produce un precipitate blanco con Crz(SO4)3, que es soluble in OH-.
- Ferro (Fe2+) produce un precipitate ross-brun con Fe(OH)2, que no es soluble in OH-.
- Ferro (Fe3+) produce un precipitate ross-brun con Fe(OH)3, que es soluble in OH-.
Testes pro Gases
- Ammonia (NH3) es un gas incolor, con un odor pungent e damp, que fa que le papiro de litmus rubio se volve azur.
- Dioxid de carbon (CO2) es un gas incolor, con un odor neutro, que fa que le aqua de limewater se volve milky o cloudy.
- Chloro (Cl2) es un gas verde pallide, con un odor asfixiante, que fa que le papiro de litmus azur se volve rubio.
- Oxygen (O2) es un gas incolor, con un odor neutro, que fa que le splint de test tube relight.
- Sulfur dioxide (SO2) es un gas incolor, con un odor pungent, que fa que le potassium manganate acidificate se volve brun.
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Description
This quiz covers the test for cations in chemistry, including reactions with Sodium hydroxide (NaOH) and identification of metal ions like Zinc, Copper, Calcium, Chromium, and Iron. It includes observations of precipitates formed by different cations.
