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).
