Question

Whar expected to frening point of ubetance when a .dded to, b increa 2 To analize the compo ition Ni in Ni NHwa what chemical wa added to enerare the isolation of b NaOH 3 Which of the following filie when synthesizing Ni NIN-CI the minimal amount of beat the reaction at 60c d collected product by vacuum filtration To isolate from the chlorides of the group Ication, we dissolve Poo by Adding Ha c heating in hot water b Adding Nils d adding HNO 5 To the residue containing the chalondes of and Hig 6M NH is added, the resulting filmate is Ag a Solubiliry product b. Molal freezing point depression 7. Group cations are precipitated as 8 Group I. m.& III cations form solid that allow their the separanon from the solution is c. equilibrium 9 When d. ion product b a liquid cools below its freezing point before crystallization occurs, the liquid undergoes exothermic supercooled reactinn d descrbed colligative properties la Which reagent can be used to precipitate Group 11 cat ns? c. HCl

Answer 1

Ans 7- (a) Insoluble chloride (Group I (Ag+, Pb2+, Hg2+) cations produce insoluble chlorides so they can be precepitated with dilute HCl, while all other cations remain in solution.)

Ans 6 - (d) Molality (the m in $\Delta$ T_f =K_f m is molality)

Ans 5- (a)[Hg(NH₂)Cl](HgCl+6NH₃ -------->[Hg(NH₂)Cl]