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2. Calculate the concentration of the salt stock solution you made in moles CaCl₂ per L (M). Note: The salt you worked with was a hydrated, CaCl₂ (H₂O)2 salt. You have to account for the mass of the water in the salt when you calculate your solution's concentration.

2. Calculate the concentration of the salt stock solution you made in moles CaCl₂ per L (M). Note: The salt you worked with was a hydrated, CaCl₂ (H₂O)2 salt. You have to account for the mass of the water in the salt when you calculate your solution's concentration.

Chemistry
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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I need help completing a lab report for chemistry. I attached assignment questions and lab obervations.

Important notes: 

- The salt I worked with was a hydrated CaCl2*(H2O)2 salt.

- Density for 1st diluted salt solution was 0.968g/mL, mixed 22mL of salt solution with 6mL of water

- Density for 2nd diluted salt solution was 0.944g/mL, mixed 15mL of salt solution with 13mL of water

-Density for 3rd diluted salt solution was 0.956g/mL, mixed 8mL of salt solution with 20mL of water

2. Calculate the concentration of the salt stock solution you made in moles CaCl₂ per L (M). Note: The salt you worked with was a hydrated, CaCl₂ (H₂O)₂ salt. You have to account for the mass of the water in the salt when you calculate your solution's concentration. 3. Calculate the density of the salt stock solution you made in grams per mL 4. Calculate the concentration and density of the first diluted salt solution you made 5. Repeat the previous calculations for the second and third salt solution dilutions. You don't have to show your work this time. 6. Make a graph of salt solution density versus concentration. Your plot must have a title, axes labels, a line of best fit, and the equation for this line, including its R² value. 7. Use your plot to determine the concentration of the unknown solution. Post-Lab Questions 1. In your own words, what does your plot's R² value tell you? 2. What sorts of factors (describe two) may have caused your plot's R² value to be less than one? We're looking for things inherent to your tools and/or experimental technique; calculation mistakes or generally being not careful enough don't count.
Transcribed Image Text:2. Calculate the concentration of the salt stock solution you made in moles CaCl₂ per L (M). Note: The salt you worked with was a hydrated, CaCl₂ (H₂O)₂ salt. You have to account for the mass of the water in the salt when you calculate your solution's concentration. 3. Calculate the density of the salt stock solution you made in grams per mL 4. Calculate the concentration and density of the first diluted salt solution you made 5. Repeat the previous calculations for the second and third salt solution dilutions. You don't have to show your work this time. 6. Make a graph of salt solution density versus concentration. Your plot must have a title, axes labels, a line of best fit, and the equation for this line, including its R² value. 7. Use your plot to determine the concentration of the unknown solution. Post-Lab Questions 1. In your own words, what does your plot's R² value tell you? 2. What sorts of factors (describe two) may have caused your plot's R² value to be less than one? We're looking for things inherent to your tools and/or experimental technique; calculation mistakes or generally being not careful enough don't count.
Unknown solution observations Solution dispersed: 22.9569 in /bottle 5.789 → just solution. 5.78 5.76=1.00 Calcium chloride weight: 4.779 solution in weighing bottle: 26.79 density Burette initial massurement in 1.15ml Calcium chloride 21.94 g Weigh bottle : : 17.1779 Final measurement: 6.91mL 6.91-1.15 2 5.76ml Volume dispensed Signature THE HAYDEN-MCNEIL STUDENT LAB NOTEBOOK hord Second First salt solution dilutions Weigh bottle: 28.7589 56.884,39 weigh w/solution bottle weigh Signature Date is ml : weigh bottle = 56.843-28.7582 28.099 Witness/TA weigh bottle = 28.7584 weigh bottle w/ solution : 58.4879 28.7589 bottlew solution 55.5429 Volume 28mL salt + 13ml water Date THE HAYDEN-MCNEIL STUDENT LAB NOTEBOOK Note: Insert Divider Under Copy Sheet Before Writir 22ml salt +6mwl water Volume z 29 mL density = 0.968g/mL 32 DUSK NO. Witness/TA Date Volume = mass Section No. Notar 55.542-28.7582 26.784 = 28 32mL -=0.944g/mL ㅈ density 8ml salt + roml water 'Joe' diensity = 0.9563/me Date
Transcribed Image Text:Unknown solution observations Solution dispersed: 22.9569 in /bottle 5.789 → just solution. 5.78 5.76=1.00 Calcium chloride weight: 4.779 solution in weighing bottle: 26.79 density Burette initial massurement in 1.15ml Calcium chloride 21.94 g Weigh bottle : : 17.1779 Final measurement: 6.91mL 6.91-1.15 2 5.76ml Volume dispensed Signature THE HAYDEN-MCNEIL STUDENT LAB NOTEBOOK hord Second First salt solution dilutions Weigh bottle: 28.7589 56.884,39 weigh w/solution bottle weigh Signature Date is ml : weigh bottle = 56.843-28.7582 28.099 Witness/TA weigh bottle = 28.7584 weigh bottle w/ solution : 58.4879 28.7589 bottlew solution 55.5429 Volume 28mL salt + 13ml water Date THE HAYDEN-MCNEIL STUDENT LAB NOTEBOOK Note: Insert Divider Under Copy Sheet Before Writir 22ml salt +6mwl water Volume z 29 mL density = 0.968g/mL 32 DUSK NO. Witness/TA Date Volume = mass Section No. Notar 55.542-28.7582 26.784 = 28 32mL -=0.944g/mL ㅈ density 8ml salt + roml water 'Joe' diensity = 0.9563/me Date
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