Answer Happy

In the experiment in which the molar volume of an ideal gas was measured, why was it necessary to retract the syringe plunger back to its starting position after injecting the HCI solution into the flask? When the HCI was injected, this added 5 mL of volume and retracting the plunger reversed this effect. O Because when the HCI was added, 5 mL of available volume in the flask was lost. Retracting the plunger reversed this effect. Because when the HCI was added the pressure dropped so retracting the plunger was meant to restore the original pressure. Because when the HCI was injected it caused an artificial spike in pressure that had to be reversed in order to accurately measure the change in pressure. Question 18 3 pts In the experiment titled The Reactions of Copper, why was it necessary to add additional sulfuric acid to the solid copper after it had been decanted? The sulfuric acid was supposed to remove any excess water that was trapped within the solid copper The sulfuric acid was supposed to prevent the solid copper from becoming oxidized The sulfuric acid was supposed to remove any of the unreacted Cu ions that were trapped within the solid copper. The sulfuric acid was supposed to remove any excess Zn (s) that was trapped within the solid copper O