How can I get a clear solution by dissolving tungsten powder in hydrogen peroxide ?

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Jan Medricky

Try to add ammonia, which keeps the pH up. Mix 1 part of ammonia and about 10-20 parts of hydrogen peroxide. This mixture should dissolve your tungsten powder completely.

Carlos Araújo Queiroz

As a complement to above (clarifying) answer by V. Alejandro Suárez Toriello, I just want to add my two cents, by mentioning that WO3 dissolves in hot NH4OH (aq).