ELECTRON TRANSFER REACTIONS DATA Part A a Wt. of 150 ml beaker and copperan 76.2
ID: 533676 • Letter: E
Question
ELECTRON TRANSFER REACTIONS DATA Part A a Wt. of 150 ml beaker and copperan 76.249 chloride dihydrate b. Wt. of 150-ml beaker 3.39 c Wt. of copper (II) chloride dihydrate (a b) d. Wt of aluminum foil e. In the space that follows, write a brief description of everything you observed when you added the aluminum to your copper(II) chloride solution. w Cis cu cucle ct to the when the alvin in unm 22 and bubb Turning the C o Poer it beg an to fi brown color. T began (um in um to cm. dar red to disinter cute the Smoke aw rise and as well and the color o the m Hure is gray f. what do you observe in your tests for copper ions and aluminum ions in the initial filtrate obtained from the collection of your copper metal. r e Aluminum ion test re cu ci Copper ion test: st clear to ni Rer cipitate. time. Rer He and Clear I is nt re Compu time clear liquid Wt. of copper and vial wt of empty vial Wt. of copper recovered (g h)Explanation / Answer
Wt of 150 mL beaker + Copper(II) chloride dihydrate = 76.24 g
Wt of 150 mL beaker = 73.75 g
Wt of Copper(II) chloride dihydrate = 76.24 g - 73.75 g = 2.49 g
Molecular formula of Copper(II) chloride dihydrate = CuCl2.2H2O
Molecular weight of Copper(II) chloride dihydrate = 170.48 g/mol
Atomic weight of copper = 63.546 g/mol
170.48 g of CuCl2.2H2O contains 63.546 g of Cu
Hence, 2.49 g of CuCl2.2H2O contains (63.546/170.48) X 2.49 = 0.928 g of copper (Answer)
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