Formal Lab
Name: Tiffany Toussaint Date: Friday, May 6th 2016
Percentage Yield: What Stopped the Silver
Purpose: To observe a single displacement reaction when silver nitrate and a copper are mixed together, which will then form silver.
Hypothesis: The percentage yield of the dry silver will be greater after the reaction between silver nitrate and copper occurs.
Materials:
Chemical safety goggles
Stirring rod
Scale
Silver Nitrate, AgNO3(s)
Copper wire
Two 100 mL Beakers
Distilled water
Scoopula
Procedure:
A sheet of lined paper was provided to record observations.
Eye protection was worn at all times during the lab.
The beaker and copper wire were measured separately and the mass of each one was recorded.
The copper wire was coiled into a loose coil. The wooden splint was then used to suspend the coil in a clean 100 mL beaker so that the coil did not touch the sides or bottom of the beaker.
About 1.06 grams of silver nitrate crystals were placed into a separate 100 mL beaker. Mass was recorded.
A small volume of distilled water was added to the beaker, that contain the silver nitrate crystals. The stirring rod was used to help dissolve the crystals. The rod was then rinsed. More distilled water was added until the beaker was filled to about 3 cm from the top.
The wooden splint with copper wire was then attached and placed on the rim of the beaker. The splint was then removed and copper was then placed into the silver nitrate solution.
Beaker was covered with saran wrap and set aside for two days.
Two Days Later
A clean stirring rod was cleaned using distilled water and the silver from the wire was then scraped off into an empty beaker using the rod.
Time was allowed for both the silver and copper rod to dry in separate beakers.
The mass of the dried silver and copper rod was measured and recorded.
Materials were put away and disposed directed by the teachers instructions.
Observations: