Three separate trials and the average of those three

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three separate trials and the average of those three trials are recorded at the bottom of Data Table 1. 2. A completed data table (like the one found on page 15 of your lab manual). Data Table #1 unknown number: 817670 molatiry of HCl ( aq ) 0.2975 M Trial 1 Trial 2 Trial 3 mass of soda ash sample 1.015 g 1.023 g 1.093 g initial buret reading 11.75 mL 4.03 mL 3.55 mL final buret reading 34.61 mL 27.11 mL 28.19 mL volume HCl added 22.86 mL 23.08 mL 24.64 mL % Na 2 CO 3 in sample 35.51% 35.57% 35.54% average % Na 2 CO 3 35.54% parts per thousand (ppt) 2
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Emma Quinn Chem 1120-102 Tuberty 3. Show the calculation to obtain the volume of HCl ( aq ) added for the trial 3 titration. final buret reading - initial buret reading = volume HCl added 28.19 mL - 3.55 mL = 24.64 mL —> 0.02464 L 4. Show the calculation to obtain the moles of HCl ( aq ) added for trial 3 . 5. Show the calculation to obtain the grams of Na 2 CO 3 in your soda ash sample for trial 3 . 6. Show the calculation to obtain the % Na 2 CO 3 in your soda ash sample for trial 3 . 7. Show the calculation for determining the average % Na 2 CO 3 in your soda ash sample. 8. Calculate the precision of your % Na 2 CO 3 in your soda ash sample by determining the ppt (parts per thousand). Write a sentence or two describing what your ppt value actually means in regards to your data. My ppt of 2 is far lower than the suggested limit of a ppt of 15 which correlates to a high level of precision in my results. This means that the results of my three trials are close together and similar in value.
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