Question

Hello, can someone please verify these calculations and let me know if they are correct or if I’m missing any steps.

The question was: What was the concentration of acid of the juice samples you tested? Show the calculations for how you determined the acid content.

Thank you!

Welch's Light White Grape Juice Trial 1 Trial 2 Trial 3 Amount of Grape Juice added (mL) 5,00 5.00 5,00 Amount of water added (mL) 15.00 15.00 15.00 Drops of indicator added 5 5 5 Initial Buret Reading (mL) 40,00 40.00 40,00 Final Buret Reading (mL) 15.00 15.00 15.00 Volume displaced (mL) 25.00 25.00 25.00 -4 1.63x 10 -4 1.63x 10 -4 1.63x 10 Moles tartaric acid Concentration 0.0036 0.0036 0.0036 Initial Buret Reading (mL) 40.00 40,00 40.00 Final Buret Reading (mL) 15.00 15.00 15.00 Volume displaced (mL) 25.00 25.00 25,00 -4 1.63x 10 -4 1.63x 10 -4 1.63x 10 Moles tartaric acid Concentration 0,0036 0.0036 0.0036 Tartaric Acid: C H0 4 fr -2 +Na 4 CH 0 (aq) 2 NaOH (aq) C H 0 2 H 6 4 6 25.00 ml NaOH x 0.0131 mol NaON 1000m 1 mol tartaric acid moles tartaric acid 1.63x 10 2 moles NaOH Concentration 1.63x10 moles tartaric acid 0.0036 M 0.045L Welch's 100% White Grape Juice Trial 1 Trial 2 Trial 3 Amount of Grape Juice added (mL 5.00 5.00 5.00 15.00 Amount of water added (mL) 15.00 15.00 Drops of indicator added 5 5 Initial Buret Reading (mL) 40.00 40.00 40,00 Final Buret Reading (mL) 9.00 11.00 10.00 Volume displaced (mL) 31,00 29.00 30,00 -4 190x 10 -4 1.97x 10 2.03x 10 Moles tartaric acid Concentration 0.00387 0.00394 0.00398

Answer 1

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