Ammonium ions can be identified in a solution by adding dilute sodium hydroxide solution and gently heating. If ammonium ions are present, they will be converted to ammonia gas. Ammonia has a characteristic choking smell. It also turns damp red litmus paper or damp universal indicator paper blue.
Responda
True
False
Questão 7
Questão
When NaOH is added to Fe2+, what colour is the precipitate?
Responda
Orange-brown
green
blue
Questão 8
Questão
When NaOH is added to Fe3+, what colour is the precipitate?
Responda
Green
Orange-brown
Blue
Questão 9
Questão
When NaOH is added to Cu2+, the precipitate is green
Responda
True
False
Questão 10
Questão
When dilute NaOH is added to Zn2+, a white precipitate forms
Responda
True
False
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