University Teknologi MARA

Sabah Branch

Faculty of Applied Sciences

Diploma in Sciences

CHM 361 LABORATORY REPORT

Experiment Number: 02

Title:

Qualitative Analysis of Group II Cations: Hg2+, Bi3+, Cu2+, Cd2+, Sn2+, Sn4+.

Date of Submission: 16th JANUARY 2013

Lab Partner’s Name:

1. Ramona binti Masri (2010203492)2. Siti Nurajjar binti Jami (2010673706)3. Suliana binti Salim (2010)4. Yusliana binti Yusof (2010)

Lecturer’s Name: PM Gan Gin Hoon

1.0 TITLE:Qualitative Analysis of Group II Cations: Hg2+, Bi3+, Cu2+, Cd2+, Sn2+, Sn4+.

2.0 OBJECTIVE:To identify the group II cations in solutions.

3.0 CHEMICALS:3.1 Solutions of Hg2+, Bi3+, Cu2+, Cd2+, Sn2+, Sn4+.3.2 NH3

3.3 NaOH3.4 KI3.5 K2CrO4

3.6 HgCl2

3.7 Solution B13.8 Solution B2

4.0 PROCEDURE:

4.1 Part A: Reactions of Group II Cations

4.1.1 A small amount of ammonia solution was added (drop wised) into the sample. Then, an excess amount of ammonia was added.

4.1.2 A small amount of NaOH solution was added (drop wised) into the sample. Then, an excess amount of NaOH was added.

4.1.3 A small amount of potassium iodide, KI solution was added (drop wised) into the sample. Then, an excess amount of the reagent was added.

4.1.4 A small amount of potassium chromate, K2CrO4 was added into the sample. Then, an excess amount of the reagent was added.

4.1.5 For Sn2+ and Sn4+ only. Some mercury (II) chloride, HgCl2 solution was added into the sample.

4.1.6 The solutions were observed, and the observations were recorded in a table.

4.2 Part B: Identification of the Cations Present in Unknown Samples.

4.2.1 The tests as in Part A was carried out on Solution B1 and Solution B2.

4.2.2 The cation present in each solution was identified.