(WCSP24) You used a titration in the water hardness experime…

(WCSP24) You used a titration in the water hardness experiment.  Please respond to the following in a few words: a.  Why is a titration useful? b.  Describe what is happening at the atomic level throughout the titration. c.  How do we know that the titration is complete?

Copper was mixed with nitric acid (HNO3). Fizzing and bubbli…

Copper was mixed with nitric acid (HNO3). Fizzing and bubbling occurred along with a color change from colorless to blue. The gaseous product was collected in a test tube and exposed to a glowing splint.  A loud pop was heard.  (WCSP24) Identify the gas produced and indicate what observation would correspond to a different gas by making the following matches.