Hello!
I was recovering platinum from an alloy with different metals (Au, Pt, Pd, Ag, Cu, Zn....)
I dissolved the alloy in AR and i filtered to separate the silver chlorides that had formed.
Later, I added sulfamic acid with the hot solution with the intention of eliminating the nitric acid until the bubbles stopped coming out.
I was about to add ammonium chloride to form ammonium hexachloroplatinate, when suddenly, I noticed that a canary yellow powder was beginning to form at the bottom of the flask. I HAD NOT ADDED THE AMMONIUM CHLORIDE YET.
What is happening? What compound is this?
Why is it formed when hot sulfamic acid is added?
someone knows?
I was recovering platinum from an alloy with different metals (Au, Pt, Pd, Ag, Cu, Zn....)
I dissolved the alloy in AR and i filtered to separate the silver chlorides that had formed.
Later, I added sulfamic acid with the hot solution with the intention of eliminating the nitric acid until the bubbles stopped coming out.
I was about to add ammonium chloride to form ammonium hexachloroplatinate, when suddenly, I noticed that a canary yellow powder was beginning to form at the bottom of the flask. I HAD NOT ADDED THE AMMONIUM CHLORIDE YET.
What is happening? What compound is this?
Why is it formed when hot sulfamic acid is added?
someone knows?