ch 10 Flashcards
What are the metal ions you can test for using a flame?
Lithium Li+
Sodium Na+
Potassium K+
Calcium Ca²+
Barium Ba²+
Copper (II) Cu²+
What flame color does sodium Na+ have?
Yellow.
What flame color does potassium K+ have?
Lilac.
What flame color does lithium Li+ have?
Red
What flame color does calcium Ca²+ have?
Orange-red.
What flame color does barium Ba²+ have?
Light-green.
What flame color does copper (II) Cu²+ have?
Blue-green.
What are the anions?
Chloride Cl⁻
Carbonate CO₃²⁻
Bromide Br⁻
Iodide I⁻
Sulfate SO₄²-
Sulfite SO²⁻ ₃
Nitrate NO⁻ ₃
How do you test for Chlorine Cl⁻ and what is the test result (anion)?
Acidify with dilute nitric acid, then add aqueous silver nitrate (white ppt).
How do you test for Carbonate CO₃²⁻ and what is the test result (anion)?
Add dilute acid, then test for carbon gas (effervescence, carbon dioxide produced).
How do you test for Bromide Br⁻ and what is the test result (anion)?
Acidify with dilute nitric acid, then add aqueous silver nitrate (cream ppt).
How do you test for Iodide I⁻ and what is the test result (anion)?
Acidify with dilute nitric acid then add aqueous silver nitrate (yellow ppt).
How do you test for Sulfate SO₄²- and what is the test result (anion)?
Acidify with nitric acid then add aqueous barium nitrate (white ppt).
How do you test for Sulfite SO²⁻ ₃ and what is the test result (anion)?
Add a small volume of acidified aqueous potassium manganate (VII)
(the acidified aqueous potassium manganate (VII) changes color from purple to colorless).
Q
How do you test for Nitrate NO⁻ ₃ and what is the test result (anion)?
Add aqueous sodium hydroxide to aluminium foil and warm carefully (ammonia produced).
How do you test for Al and what is the test result (cation)?
add aqueous sodium hydroxide
white ppt,soluble in excess giving colorless sol
add aqueous ammonia will form white ppt insoluble in excess
How do you test for ammonium and what is the test result (cation)?
add aqueous sodium hydroxide
ammonia produced on warming
How do you test for calcium and what is the test result (cation)?
add aqueous sodium hydroxide
white ppt,isoluble in excess
add aqueous ammonia will form no ppt
How do you test for Cr and what is the test result (cation)?
add aqueous sodium hydroxide
green ppt,soluble in excess
add aqueous ammonia will form green ppt insoluble in excess
How do you test for iron 2 and what is the test result (cation)?
add aqueous sodium hydroxide
green ppt, insoluble in excess turning brown
add aqueous ammonia
green ppt, insoluble in excess turning brown
How do you test for iron 3 and what is the test result (cation)?
add aqueous sodium hydroxide
red-brown ppt, insoluble in excess
add aqueous ammonia
red-brown ppt, insoluble in excess turning brown
How do you test for zinc and what is the test result (cation)?
add aqueous sodium hydroxide
white ppt, soluble in excess giving colorless sol
add aqueous ammonia
white ppt, soluble in excess giving colorless sol
How do you test for cu and what is the test result (cation)?
add aqueous sodium hydroxide
light blue ppt, insoluble in excess
add aqueous ammonia
light blue ppt, soluble in excess giving dark blue sol
How do you test for SO2 and what is the test result (gas)?
turns acidified aqueous potassium manganate from purple to colorless
