Passage I

The 4 common halide ions are fluoride (F-), chloride (C1-), bromide (Br-), and iodide (I-). A halide in solution can be identified by mixing the solution with various test solutions and observing the precipitates (solids), if any, that form.

Table 1 shows the results of mixing each of 4 colorless aqueous halide solutions with a colorless aqueous test solution containing calcium (Ca2+), silver (Ag+), thallium (T1+), or lead (Pb2+).

Table 2 shows the results of mixing each of 2 colorless aqueous solutions (A and B) with each test solution. Each of Solutions A and B is a combination of 2 of the halide solutions.

1. Table 1 shows the results of how many total tests?

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

4 horizontal and vertical columns, so 4*4=16