6 16 Analysis Of Baking Soda Tations Provide A Method Of Quantitatively Measuring The Concenation Of An Unknown Solutio 1 (38.47 KiB) Viewed 41 times
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The moles of HCl can be converted to moles of NaHCO3 using the coefficients from the balanced equation. What is the mole to mole ratio of HCl to NaHCO3? How many moles of NaHCO3 are present in the sample?
6 16 Analysis Of Baking Soda Tations Provide A Method Of Quantitatively Measuring The Concenation Of An Unknown Solutio 5 (47.5 KiB) Viewed 41 times
6-16: Analysis of Baking Soda Tations provide a method of quantitatively measuring the concenation of an unknown solution in an acid-base ration, he is done by delivering a strant of known concentration an analyte of known volume (The concentration of an unknown that can also be determined by station with an analyte of known concentration and volume) Teration curves (graphs of volume vs. pH have characteristic shapes. The graph can be used to determin strength o weakness of an acid or hase. The equivalence point of the stration, or the point where the analyte has been completely consumed by the strant, is identified by the poet where the changes rapidly over a smalt volume of strant delivered in this assignment, you will dete the mass of an unknown sample of taking soda (NaHCO) by rong with an in of known concentration 1. Start Visual ChemLab select Acid-Base Chemistry and then select Analysis of Baking Soda from the list of assignments. The lab will open in the Tarations laboratory The laboratory will open with a beaker on the str plate with 1.5000 g of impreso NCO and with sufficient water added to make the total volume 25.00 mL. Methyloge indicator will have also been added to the beaker, as well as the calibrated p 2. Click on the BureZoom View window and the pet meer window to bring to the Font. The buret will be filed with 0.3015 M HCL Click the Save button in the Buner Zoom View window so the station data can be saved. The horizontal position of the orange handle is off for the stopcock Open the stopcock by pulling down on the orange hande The vertical position delivers solution the fastest with three intermediate an between Tum the stopcock to one of the fastest positions. Observe the stration curve When the blue ine begins to tum down, double click the stopcock to tum of Move the stopcock down one position to add volume drop by drop There are methods for determining the volume at the equivalence pot (1) Stop the sation when a color change occurs. Click the Stop buton in the Bure Zoom View A data nk icon will appear in the lab book Click the data link icon to open the Date Viewer window Scroll down to the last data entry and record the volume at the equivalence point in the data table below OR (2) And drops slowly through the equivalence pont une the pH reaches approximately 2. Click the Stop button in the Burer Zoom View A data con will appear in the lab book Click the data link icon to open the Data Viewer window Click the Copy Data button to copy and paste the data to a spreadsheet P the first derivative of pH vs. volume. The peak will indicate the volume at the equivalence point since this is where the pH is changing the most rapidly as the volume changes Unknown sample 1 Data Table Mass unknown sample Volume (C 1.500 42.75 ww Marty C 03015 Wabalanced chemical equation for the reaction between NaCONCE NAHCOS HCI-HOHRO+CO 5. Cute themes of HC by mutlying the volume of HC ans and the marity of HC m (Keep four significant digts in all of the calculation) 5. The moles of HC can be converted to moles of NaHCO using the coefficients from the balanced equation What is the mole to mole ratio of HCl to NaHCO? How many moles of NaHCO are present in the sample? & Cat the gras of NaCO by muling the moles of NC by the weight of Nico(84.007 g 126.01650030084000740007 7. The mass of NaHCO present in the sample can be calculated by dividing the mass of Ofrom question by the mass of the sample from the data table and png by 100. What the mo
3. Data Table Mass unknown sample 1.500 Volume (HCI) 42.73 Molarity HCI(mol/L) 0.3015 tudy source was downloaded by 100000835076761 from CourseHero.com on 07-10-2022 14:30:39 GMT-05:00 www.courschero.com/file/71895045/analys ... g-sodadocx 4. Write a balanced chemical equation for the reaction between NaHCO3 and HCI. NaHCO3 + HCl -->NaCl + H2O+CO2 5. Calculate the moles of HCI by multiplying the volume of HCI in liters and the molarity of HCI in mol/L. (Keep four significant digits in all of the calculations.) 1.288 x 10^-2mol 5. The moles of HCI can be converted to moles of NaHCO using the coefficients from the balanced equation. What is the mole to mole ratio of HCI to NaHCO:? How many moles of NaHCO3 are present in the sample? 6. Calculate the grams of NaHCO3 by multiplying the moles of NaHCO by the molecular weight of NaHCO: (84.007 g/mol). 1.5000 x 84.007 = 126.0105 7. The mass % of NaHCO3 present in the sample can be calculated by dividing the mass of NaHCO: from question #6 by the mass of the sample from the data table and multiplying by 100. WI t is the mass % of NaHCO3? 126.0105/1.500x100=8400.07 or 84.0007%
6-16 Analysis of Baking Soda Mass Linknown sample 1.500 G. 3. 9. Volume (HCI) 5. 1. 2 88 X 10² mol 72.73 4 NaHCO, + HCl - Nacht 42009 8. 1.5000 x 84.007 Molomity HCT (mol) 126.0105 1.500 x 100 0.3015 F 126.0105 HỌ+ Cơ, 8400-07 or 84.00 07%.
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