Chemistry Ch9 Flashcards
(6 cards)
1
Q
Which reagent is used in the first step of qualitative analysis for Mg²⁺, Ca²⁺, Sr²⁺, and Ba²⁺?
A
Ammonium hydroxide + Ammonium carbonate
2
Q
What is the color of the precipitate formed when Magnesium ammonium phosphate (MgNH₄PO₄) is produced?
A
White
3
Q
In the qualitative analysis of Ba²⁺, which reagent is used to form a yellow precipitate of Barium Chromate (BaCrO₄)?
A
Potassium chromate
4
Q
After removing Ba²⁺, which cation remains in the supernatant and is tested in the next step?
A
Sr²⁺ and Ca²⁺
5
Q
What is the final confirmatory test for Ca²⁺ in the reaction scheme?
A
Formation of Calcium Oxalate (CaC₂O₄)
6
Q
Which reagent is specifically used to differentiate Sr²⁺ from Ca²⁺ in qualitative analysis?
A
Ethanol + Ammonium hydroxide + Heating
