4. The substance under study with a solution of ammonium oxalate gives a white crystalline precipitate, soluble in a solution of hydrochloric acid and with a solution of silver nitrate - a white curdy precipitate, which dissolves in a solution of ammonia. Name the substance, confirm your answer with reaction equations.

If you cannot open the file or have any problems, do not rush to leave a negative review! Contact me and I will quickly help you solve the problem. After purchasing, please leave a positive review of the product :)