PREPARATORY PROBLEM 29 (PRACTICAL) Identification of Unknown Solutions (I) – Spot Test without Elect — Analytical Chemistry Chemistry Question

PREPARATORY PROBLEM 29 (PRACTICAL)
Identification of Unknown Solutions (I) – Spot Test without Electrolysis

1. This is a practical exercise best performed using spot test.
2. In a plastic bag, there are 12 unknown samples in droppers numbered X₀₁ to X₁₂. Each sample in the 1 cm₃ droppers, contains a aqueous solution of a simple compound (with a concentration of 0.1 mol dm–3). A list of the compounds is given in the Data Sheet. There are also a dropper containing phenolphthalein, two empty droppers, a pallet, two coffee stirrers, a bottle of distilled water, and a small pack of tissue paper for your use.
3. Use the materials provided and mutual reactions of the unknown solution to identify each unknown sample and write your answer (code number) in the blank of the Data Sheet.

Note:
(1) Three samples are duplicated.
(2) The volume of each sample is about 0.6 cm₃. No more solution will be provided.
(3) Each correct answer gets 8 points, and each incorrect answer will be penalized 2 points.