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Copy of Copy of Analysis for Acid (lab 17)

# Copy of Copy of Analysis for Acid (lab 17) - Laboratory 17...

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Your Section: 02 Laboratory 17 4/17/07 Part One: The Preparation of a Standard Base Solution Molecular Weight of KHP: 204.22 Formula Used Trial 1 Trial 2 Trial 3 Trial 4 Initial buret reading: data 0.00 0.00 0.00 0.00 Final buret reading: data 24.60 24.71 24.51 24.60 ml of NaOH used: =d9-d7 24.60 24.71 24.51 24.60 ht of bottle before addition to flask: data 5.1 5.0890 5.0867 5.09 ght of bottle after addition to flask: data 5.05 5.0395 5.04 5.04 Grams of KHP used: =d13-d15 0.05 0.0495 0.05 0.05 Moles of KHP used: =d17/\$b\$3 0.0002 0.0002 0.0002 0.0002 Molarity of NaOH: =D19/(D11/1000) 0.0093 0.0098 0.0098 0.0099 Calculated Answer Average Molarity of NaOH: =average(d21:g21 0.0097 Part Two: The Analysis of a Food for Acidity Formula Calculated Used Answer Remember, the end p Milliliters of Juice Used: data 25.00 Milliliters of Base at endpoint: from graph 7.30 Moles of Base used: =\$d25*(d34/1000) 7.08E-05 Moles of Citric Acid in Juice: =d36/3 2.36E-05 Molarity of Citric Acid in Juice: =d38/(d32/1000) 9.43E-04

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Your Section: 02 Laboratory 17 4/17/07 Part Three: Titrating an Unknown Solid Trial 1: Trial 2: Buret Buret Reading pH Reading pH data data h8-h7 i8-i7 k8/j8 data data m8-m7 n8-n7 p8/o8 0.00 3.10 0.00 3.18 9.78 4.21 9.78 1.11 0.113 3.01 3.63 3.01 0.45 0.15 13.40 4.79 3.62 0.58 0.160 5.60 4.12 2.59 0.49 0.19 15.50 5.34 2.10 0.55 0.262 8.50 4.66 2.90
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Copy of Copy of Analysis for Acid (lab 17) - Laboratory 17...

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