To determine one cation and anion in a PbNo3
Answers
Explanation:
To detect one cation and one anion in the given salt from the following ions: ... Take 0.1 g of the salt in a test tube and add 1–2 mL
Answer:
We will use Sodium hydroxide and ammonium hydroxide to test for Lead ions and aluminium, sodium hydroxide, and wet litmus to test for Nitrate ions.
Explanation:
From the given formula, Lead is the Cation, whereas Nitrate is the anion.
We test for anions and cations differently.
For cations, we use either Sodium hydroxide or ammonium hydroxide.
Testing for Lead
We will use either Sodium Hydroxide or Ammonium hydroxide.
When drops of sodium hydroxide is added to the solution a white precipitate of Pb(OH)2 is formed and it dissolves when excess sodium hydroxide is added.
however, when we add ammonium hydroxide, a white precipitate of Pb(OH)2 which does not dissolve in excess ammonium hydroxide is formed.
Testing for Nitrate ions
Add the Lead Nitrate solution to sodium hydroxide solution followed by aluminium powder.
The Nitrate ion is reduced by the aluminium to give off ammonia gas.
Use a wet litmus paper to test whether the gas is ammonia.
If the litmus turns blue, then the gas is ammonia, and this confirms the presence of Nitrate ions.