Evaluating Temperature's Impact on Salt Solubility

Hard Research Summaries Experimental Design

A research study aimed to investigate the relationship between temperature and the solubility of a specific salt in water. The researchers conducted an experiment where they heated the water to different temperatures: 25°C, 50°C, 75°C, and 100°C. For each temperature, they added a fixed amount of salt and recorded the amount that dissolved over a fixed time period. The study aimed to determine how temperature affects the solubility of the salt.

The researchers wish to ensure that their measurement of salt solubility is accurate. Which of the following experimental designs would best improve the validity of their results?

Using a variety of different salts to see if the temperature effect varies by salt type.

Repeating each measurement of dissolved salt multiple times at each temperature.

Measuring the temperature of the solution after salt has been added.

Changing the amount of salt added to each sample before measuring solubility.

Hint

Submitted13.0K

Correct8.5K

% Correct65%