Select the observations that might indicate a chemical change has occurred. Group of answer choices

Formation of a substance in a different state

Breaking or melting

Phase change

Production of flames

Production of heat or light

Achemistry student weighs out of phosphoric acid , a triprotic acid, into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution. calculate the volume of solution the student will need to add to reach the final equivalence point. round your answer to significant digits.

Which statements are true about electrolysis? check all that apply. electrolysis requires an acid be present. electrolysis is described by two half-reactions. electrolysis is not an industrial process. electrolysis results in commercially valuable products. electrolysis involves the transfer of electrons. reduction results in the loss of electrons. oxidation results in the loss of electrons.

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?