| White lotion is composed of | 1 Sulfurated potash
2 Zinc sulfate |
| Synonyms of White Lotion | 1 Lotion alba
2 Lotion sulfurata |
| Chemical Reaction in the Preparation for White Lotion | ZnSO4 + K2S3 → ZnS + 2S + K2SO4 |
| Physical Test | Color: White
Odor: Sulfuric Smell
Physical Appearance: Aqueous / Semi-aqueous and Low viscosity |
| White lotion reacts with Sodium cobalt nitrite (Test for Potassium Ions) | Na3Co(NO2)6 (aq) + K2SO4(aq) + H2O
→ :K2Na[Co(NO2)6]·H2O (s) + Na2SO4 (aq)
Precipitate: Potassium sodium cobalt nitrite
Color of precipitate: Yellow precipitate (Potassium ions) |
| White lotion Test for Sulfide ion | A) White Lotion and Sulfuric is added and produces BLACK color precipitate
Product formed:
Lead sulfide (Black precipitate)
2 Sodium nitroprusside (Violet / Purple color)
B) If Sodium nitroprusside is added, the color changes into violet or purple
Formula:
S2−+Na2[Fe(CN)5NO]⟶Na2[Fe(CN)5NOS]2- |
| White lotion Test for Zinc ion | A) When Ammonium sulfide and White lotion reacts, White precipitate forms
B) Zinc + acetic acid produces white precipitate
C) When Hydrochloric acid is added to white precipitate, Precipitate dissolves |
| Potassium flame test | Lilac color |
