Questions asked after completing quantitative volumetric analysis of pickling vinegar & NaOH (regular vinegar consists 5% acetic...

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Chemistry

Questions asked after completing quantitative volumetricanalysis of pickling vinegar & NaOH (regular vinegar consists5% acetic acid, CH3COOH. Piclking vinegar consists 7% of theacid).
1. Is there a trend in the values obtained in class? (there wasa trend) Explain.
2. If regular vinegar costs $1.00/L & pickling vinegar costs$1.25/L, which is the best by? (i.e use a logical argument todetermine which gives you the most acetic acid for your dollar)
3. Why do we only include the trials that agree withing 1% ofeach other? What is the difference between accuracy & precisionfor a series of measurements?
4. Identify 4 important sources of systematic (not human) error.Discuss why they are important.
5. If 0.25M potassium hydroxide solution was used as thetitrant, instead of 0.1 M NaOH (aq), would your titration have usedmore or less itrant to reach the end point? Use a logical argumentto determine how much more or less titrant would be required.

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4.2 Ratings (733 Votes)

2 5 CH3COOH means 5g in 100 g water so 1L or 1000g of waterwill contain regularVinegar 50 g AceticAcidWhere as 1L or 1000g of water 7 pickling vinegar 70 g aceticacidSo per g price 150 for 5 002 and 12570 for 7 0018Thus 7 acetic acid or pickling vinegar is cheaper3 When we use significant figures then an implicit uncertaintyis considered the last digit is considered uncertain For examplea result reported as 115 implies a minimum See Answer

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