You are given an unknown substance, which may be an acid or a base or may be neutral. To determine which, you will need to test for specific properties. Select the laboratory equipment below that would help classify this substance.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.