Lab Report ~ Makenna Koehl, Michelle Wright , and Megan Harris ~ Period 7 ~ February 27, 2017

Background

Double Displacement Reaction: In a double-displacement reaction, the ions of two compounds exchange places in an aqueous solution to form a new compound.

Insoluble Salt: Ionic or metal compounds that don't dissolve in water.

Reaction 1 Predicted Products: 3AgNO3[aq] + FeCl3[aq] -> Fe(NO3)3[aq] + 3AgCl[s]
Left: The orange liquid (not clear) is what Iron iii nitrate (a product) looks like by itself. Top Right: This is what Silver chloride (a product) looks like by itself. Bottom Right: This is what Iron iii nitrate and Silver chloride look like together. Sources: Left- https://socratic.org/questions/when-dilute-aqueous-solution-of-iron-iii-nitrate-and-sodium-hydroxide-are-mixed- Top Right- www.saltlakemetals.com/Silver_Chloride.htm Bottom Right- http://www.slideshare.net/mobile/pinillafelisa/precipitation-react2
Reaction 2 Predicted Products: AgNO3[aq] + KI[aq] -> KNO3[aq] + AgI[s]
Left: The clear liquid (not the white) shows what Potassium nitrate looks like by itself. Middle: This shows what Potassium nitrate and Silver iodide look like together. Right: This is what Silver iodide looks like by itself. Sources: Left- http://www.ltcconline.net/stevenson/2008CHM101Fall/CHM101LectureNotes20081027.htm Middle- http://fphoto.photoshelter.com/image/I0000u.fFBetNP7U Right- https://m.indiamart.com/impcat/silver-iodide.html

Uses

Silver nitrate: Cloud seeding/ weather modification, photography. Source: https://www.britannica.com/science/silver-iodide

Silver chloride: Photography, making window glass, pottery glazes. Source: http://www.softschools.com/formulas/chemistry/silver_chloride_uses_properties_structure_formula/293/

Purpose

The purpose of the lab is to be able to predict products of chemical reactions and write out net Ionic equations.

Materials

AgNO3, MgSO4, NaOH, Pb(NO3)3, CuSO4, FeCl3, KI, Na3PO4, 8 pipets (one for each chemical), q-tips, toothpicks, well plate

Prediction 1

Molecular: 3AgNO3 + FeCl3 -> Fe(NO3)3 + 3AgCl

Complete Ionic: 3AgNO3[aq] + FeCl3[aq] -> Fe(NO3)3[aq] + 3AgCl[s]

Net Ionic: 3Ag + Cl3 -> 3AgCl

Prediction 2

Molecular: AgNO3 + KI -> KNO3 + AgI

Complete Ionic: AgNO3[aq] + KI[aq] -> KNO3[aq] + AgI[s]

Net Ionic: Ag + I -> AgI

Procedure

1. Holding a pipet vertically add 2 drops of each solution into the appropriate wells on the well plate

2. Carefully stir each mixture with a toothpick

3. Record each well on the data table with a R for reaction and NR for no reaction

4. After all reactions have been preformed and recorded dump the contents of the well plate down the sink with pleanty of water

5. Clean and dry the lab area, wash hands, then get a clean up stamp

Data and Observations

The reactions we chose (AgNO3 + FeCl3 and AgNO3 + KI) can be seen in wells A2 and A3

This was the data we collected. There are new solids formed in A2 and A3, which is where the reactions we chose are.

Data Analysis 1

2Ag + I2 -> 2AgI

The solid formed matches our background research because they are both white, flakey, amd chalky.

This means that our results are validated.

Data Analysis 2

2Ag + I2 -> 2AgI

The solid formed matches our research because they are both yellow and flakey.

This means that our results are validated.

Conclusion

The purpose, which was to predict products of a double replacement reaction, was met because we accurately predicted two equations.

We used double replacement reactions to predict insoluble salts. Our equations predicted the insoluble salts that formed in the lab. Since both of our predicted outcomes and actual outcomes looked the same, it was a success.

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