Answers

2015-08-20T08:51:42+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Nessler's reagent  K2 Hg I4 can be formed from solutions of  Hg Cl2 + KI in water with K OH in water.
Nessler's reagent Potassium tetraIodo Mercurate K2 Hg I4 (II) can also be formed using solutions of  K I  in water, Hg Cl2 and then adding K OH and Hg Cl.

Thus Iodine atoms in the compound come from Potassium Iodide KI. 
   Since there are 4 Iodine atoms in one molecule of Nessler's ragent, we need 4 moles of KI for one mole of the reagent.

Hence,  0.4 * 4 = 1.6 moles of KI are required to produce 0.4 mole of K2 Hg I4.

1 5 1