Using this lab answer the question Label four 25 x 150 mm test tubes: Ni(H 2 O)

ID: 871399 • Letter: U

Question

Using this lab answer the question

Label four 25 x 150 mm test tubes: Ni(H2O)62+, Ni(en)(H2O)42+ , Ni(en)2(HO)22+ and Ni(en)32+.

To the four tubes, transfer 1 mL of NiCl2 solution and 15 mL of water, stir the solutions

To the tube Ni(H2O)62+ let aside and use as control

To the tube Ni(en)(H2O)42+, transfer 0.5 mL of 12.5% ethylenediamine Stir the mixture.. A light blue color should appear.

To the tube Ni(en)2(H2O)22+, add 1 mL of 12.5% ethylenediamine and stir. A royal blue color should appear.

To the tube Ni(en)32+ , add 1.5 mL of 12.5% ethylenediamineand stir. A violet color should appear.

According to the colors which of them would be more stable?

A Violet colour would be more stable because then concentration of ethylenediamine is more.

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