D CHEM 1307005 G What Is The pH Of A C C MindTap Crngage

D CHEM 1307-005 G What Is The pH Of A C × × \\ C MindTap . Crngage nb/uijindexhtml?nbld-7483008mbNodeld-2830860028eISBN-9781337789929 8parentld-283086040 at 8 AM CST is allowed with a one time 10% penalty bo submitted score. Use the Refereaces to access important values if ereded for thin question In the laboratory you are given the task of separating Pb2+ and Fe-ions in aqueous solution. For each reagent listed below indicate if it can be used to separate the ions. Type\"\" for yes or \"N\" for no. If the reageat CAN be used to the ions, give the formula of the precipitate. If it cannot, type \"No YorN Reagent Formula of Precipitate ifYES HBr 2. KOH CO Submit Answer Choose Reagents This is group attempt 2 of 5 Autosaved at 2 49 PM RA

Solution

1. YES - PbBr2 (White)

2. YES - Fe(OH)2 (Green - Reddish brown)

3. No

The precipitating reagent of Group I is a dilute solution of hydrochloric acid, and the ions precipitated are those of silver, Ag+, mercury (I), Hg22+, and lead (II), Pb2+. The net ionic equations are:

Ag+ + Br-    AgBr(s) (AgBr is white, turning purple in light)

Hg2 2+ + 2Br-   Hg2Br2(s) (Hg2Br2 is white)

Pb2+ + 2Br-   PbBr2(s) (PbBr2 is white)

Fe2+ + 2OH-     Fe(OH)2(s) (red-brown)