What is the confirmatory test for ammonium ion, NH 4 + ? A white solid will prec
ID: 490387 • Letter: W
Question
What is the confirmatory test for ammonium ion, NH4+?
A white solid will precipitate.
Production of ammonia gas, NH3, and blue litmus paper turning red because it is acidic.
Production of ammonia gas, NH3, and red litmus paper turning blue because it is basic.
A red brown precipitate will form.
A)A white solid will precipitate.
B)Production of ammonia gas, NH3, and blue litmus paper turning red because it is acidic.
C)Production of ammonia gas, NH3, and red litmus paper turning blue because it is basic.
D)A red brown precipitate will form.
Explanation / Answer
NH4+ ion confirmatory test involves heating an ammonium salt with aqueous alkali to produce NH3. .
Reactions are: NH4Cl + NaOH ----> NH4OH + NaCl;
NH4OH ----> NH3 + H2O;
This NH3 gas is responsible for turning blue litmus paper into red.A piece of blue litmus is held at the path of the issuing gas. A positive test is shown by red litmus paper.
The correct answer is B)
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