lab 2 mass relations in a chemical reaction

# lab 2 mass relations in a chemical reaction - 4.3 Lab 2...

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4.3 Lab 2 Mass Relations in a Chemical Reaction EXTRA CREDIT Jennie Chang (odd) Allison yee (Partner- odd) Sharon Oh (Partner- even)

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Data Table: Mass of .00500 moles sodium phosphate 1.90g Mass of .00750 moles zinc acetate 1.65 grams Mass of 50 ml beaker 29.70 g Mass of filter paper .95 g Mass of filer paper, beaker, and dry precipitate 50.14 g Mass of dry precipitate, zinc phosphate 2.26 Observations: Day One : Before After Zinc: Crystals Crystals/gel Sodium: snowflakes clear Zn(C2H3O2) + Na2PO4= turned white and foggy Filter: water being removed, it turned glue and shampoo like Day Two: Solution looks like powder; like dry wall, plaster-y Calculations: 1. The mass of the zinc acetate and sodium phosphate: Zinc acetate- Equation: Mass= moles x molecular weight of Na3PO4 x 12 H2O Substitute: Mass= 0.00500 mol x 379.6 Solve: 1.9 g Sodium phosphate: Equation: Mass= moles x molecular weight of Zin(C2H3O2)2 2H2O Substitute: mass= 0.00750 mol x 219 Solve: 1.65g 2. Using a 4 step problem, calculate the mass of the zinc phosphate that theoretically
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## This note was uploaded on 01/09/2012 for the course SCIENCE 101 taught by Professor Stevens during the Spring '10 term at Aachen University of Applied Sciences.

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lab 2 mass relations in a chemical reaction - 4.3 Lab 2...

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