I poured a solution of FeSo4, which has been acidified with a little dilute H2So4,...
I poured a solution of FeSo4, which has been acidified with a little dilute H2So4,...
I poured a solution of FeSo4, which has been acidified with a little dilute H2So4, into a test-tube cointaining the unknown gas. If the solution turn dark brown, indentify this gas?
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