Passage IV

A study was conducted to determine whether two test kits (Kit A and Kit B) provided reliable data on the content of water samples of varying salinity (salt concentration). The concentrations of several compounds commonly tested for in water samples were measured. The results are presented in the table below. The results for the test kits were compared to estimates obtained using Standard Methods, which provide extremely accurate estimates.

Table adapted from Claude E. Boyd and Harry V. Daniels, "Evaluation of Hach Fish Farmer's Water Quality Test Kits for Saline Water." ©1988 by the World Aquaculture Society.

20. The data from which of the measurement procedures supports the conclusion that the concentration of chloride increases as the level of salinity increases?

Answer and Explanation

Your Answer is

Correct Answer is J

Explanation

The title asks about the relationship between Chloride and salinity. If you locate Chloride and observe horizontally, you will find that the concentrations measured by all methods are directly proportional to salinity, that is, as salinity increases, the concentration of Chloride increases, so all three are correct.