chem lab 8 - Sheldon Pope and Brandon Pezzuto Do Your...

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10/31/2007 Sheldon Pope and Brandon Pezzuto Do Your Reactions Oscillate? Chemistry lab section 25 1a) 0.05 L( . ( ) 0 15mols CH2 COOH 21 L )( . ( ) 104 06g CH2 COOH 21mol ( ) CH2 COOH 2 )= 0.78 g CH 2 (COOH) 2 1b) .05L( . 02mols MnSO4 H2O1L )( . 169 01g MnSO4 H2O1mol MnSO4 H2O )= 0.17 g MnSO4•H2O
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2a) 0.780g CH 2 (COOH) 2 and 0.172g MnSO 4 •H2O 2b) Do to the use of significant figures 3.026 to two significant figures can be rounded to 3g. Therefore you do not have to add or subtract solids. 3a) 0.05L ( . 20 mols KIO31L )( 214g KIO31mol KIO3 )= 2.1 g KIO 3 3b) Actual mass obtained = 2.142 g KIO 3 4a) .025L ( . 3 6mols H 2O21 L )( 34g H2O21mol H 2O2 )= 3.1 g H 2 O 2 4b) 3.1 grams H 2 O 2 ( 100 grams solution30 grams solution )= 10.333 g H ̅ 2 O 2 5) 10.33 g H 2 O 2 ( . 1 mL H2O21 11 g )= 9.20 mL H 2 O 2 6) .2 mL( 3g100mL )= .006g starch 7a) The initial color of the solution was clear 7b) The color did change from yellow/golden to clear then to blue 7c) The solution had the appearance of a gas because it was observed that gas bubbles seemed to
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This note was uploaded on 04/18/2008 for the course CHEM 403 taught by Professor Bauer during the Spring '08 term at New Hampshire.

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chem lab 8 - Sheldon Pope and Brandon Pezzuto Do Your...

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