Fall 2020 CHM 1046L QUESTIONS
Responses must be submitted to the dropbox no later than 5:00 pm (1700 hours), Wednesday 4 November 2020. Submissions received after this deadline will receive a score of zero. Submission not submitted to the dropbox will receive a score of zero. Responses must be typed except for figures, equations, etc. as necessary. All graphs should be generated using computer software of your choice. Responses must be collated and submitted as a single pdf file. Handwritten responses will receive a score of zero.
All questions are worth 10 points
|mercury(II)||sodium oxalate||rate of|
|of oxalate (M/s)|
|1||0.164||0.15||3.2 x 10-5|
|2||0.164||0.45||2.9 x 10-4|
|3||0.082||0.45||1.4 x 10-4|
|4||0.246||0.15||4.8 x 10-5|
Part A – Solution Preparation (Volumes added)
|Flask A||Flask B||Flask C|
|~3M HCl (mL)||5.00||5.00||5.00|
|ethyl ethanoate (mL)||5.00||4.00||3.00|
Part B – Titrating 5.00 mL samples of ~3M HCl with 0.495 M Barium
|Trial 1||Trial 2||Trial 3||Trial 4||Trial 5|
|initial buret (mL)||0.04||17.01||1.25||16.21||0.76|
|final buret (mL)||17.01||31.99||16.21||31.18||15.75|
|Part C – Titrating Flasks A-C with 0.495 M Barium|
|Flask A||Flask B||Flask C|
|initial buret (mL)||0.84||1.05||0.67|
|final buret (mL)||43.59||41.37||37.08|
Barium Hydroxide used = 0.495M
Densities of Solutions Used
|~3M HCl (g/mL)||1.05|
|ethyl ethanoate (g/mL)||0.893|
Given the above data and information:
adipic acid, benzoic acid, citric acid, maleic acid, palmitic acid,
salicylic acid, or tartaric acid (yes – you may need to look up information on each acid).
pH as a function of volume of base added
|volume of base added (mL)|
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