Astudent, wearing chemical safety goggles and a lab apron, is to perform a laboratory test to determine the ph value of two different solutions. the student is given one bottle containing a solution with a ph of 2.0 and another bottle containing a solution with a ph of 5.0. the student is also given six dropping bottles, each containing a different indicator listed in reference table m.
state one safety precaution, not mentioned in the passage, that the student should take while performing tests on the samples from the bottles.