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Reactions of ions in aqueous solution and Period 3 elements and their oxides MultipleChoice

Target Level

Running Total

Attempt

1 of 3

Select the correct answer from the list below; answer correctly first time for maximum marks.

[Fe(H₂O)₄(OH)₂], [Cu(H₂O)₄(OH)₂], [Fe(H₂O)₃(OH)₃] and [Al(H₂O)₃(OH)₃] are precipitates formed by adding NH₃ to [M(H₂O)₆]^2+/3+ in aqueous solution. Which of them redissolve(s) when excess NH₃ is added?

This is your 1^st attempt! You will get 3 marks if you get the answer right. Good luck!

Pass Mark

75%