All of the following except one is needed for a solubility testA. a spatulaB. a Bunsen burnerC. a test tubeD. a thermometer

The answer is B. a Bunsen burner.

Here's why:

A solubility test is a test to measure the ability of a solid or liquid to dissolve in a solvent.

A. A spatula is needed to add the substance to the solvent. C. A test tube is needed to hold the solvent and the substance. D. A thermometer may be needed to measure the temperature of the solvent, as solubility can depend on temperature.

However, B. a Bunsen burner is not typically needed for a basic solubility test. While heat can affect solubility, it's not a requirement for a basic test, and if heat is needed, there are safer methods to heat a solution in a test tube. Therefore, a Bunsen burner is the exception in this list.