Thursday, October 18, 2012

Formula of a Nitrate Lab

Homework:
-Due today: Gram to Gram Stoich
-Due tomorrow: Intro to Limiting Reactants
-Due Monday: Formula of a Nitrate Lab

We started day #1 of the formula of a nitrate lab. By doing this lab we can use the masses of the reactants and products to calculate the number of moles of copper used and silver produced.

Lab goal: To determine the formula of the nitrated silver which ion of copper formed (the +2 ion or the +3 ion).

Procedure:
1. Place 1.5g of silver nitrate and 25ml of water in either a 50ml beaker or a 100ml beaker.
2. Stir the solution until all the silver nitrate has dissolved.
3. Cut a 25cm piece of copper wire. Then loosely coil the wire and record its mass in a data table. Use the wooden split to to let the copper wire hang into the silver nitrate solution. Add 3 drops of nitric acid.

-We had to wait 15 minutes for this to happen. While we waited though we took the stoich quizzes #2 and #3. You took #2 if you weren't here yesterday, and you took #3 if you were.

4.  Clean and label 100ml beaker and record the mass.
5.  After the 15min. we removed the wire and held above the clean
100ml beaker, while steadily rinsing off the silver. Then clean off the wire in another beaker with acetone.
6. Measure/record the copper wire.
7. Carefully pour the water from the beaker full of silver into the waste flask. Don't pour out the silver!
8. Allow the solid to dry over night and record the mass of the beaker.

-Each group placed their beaker on a tray for drying, and that concluded day #1 of the lab. We will continue the lab tomorrow. Don't forget it's due on Monday!

NEXT SCRIBE: Renee H.

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