CHEM134 Week 3 Lab 3 Assignment
Course : American Public
Contributed : Hennah Gill
- $25.00
- Question: Please upload (in PDF format) your experimental setup and data collection picture as explained in Step 18 of the Lab 03 Document. This must be a single picture.
- Question: Please upload (in PDF format) your Table 1 as explained in Step 34 of the Lab 3 Document.
- Question: Please upload (in PDF format) your water freezing point graph (test tube #1 data run) as explained in Step 36 of the Lab 3 Document.
- Question: Please upload (in PDF format) your glycerol freezing point graph (test tube #2 data run) as explained in Step 36 of the Lab 3 Document.
- Question: Please upload (in PDF format) your NaCI freezing point graph (test tube #3 data run) as explained in Step 36 of the Lab 3 Document.
- Question: Please upload (in PDF format) your CaCl2 freezing point graph (test tube #4 data run) as explained in Step 36 of the Lab 3 Document.
- Question: Please paste (in text file format) your water freezing point data table (test tube #1 data run) as explained in Step 37 of the Lab 3 Document.
- Question: Please paste (in text file format) your glycerol freezing point data table (test tube #2 data run) as explained in Step 37 of the Lab 3 Document.
- Question: Please paste (in text file format) your NaCI freezing point data table (test tube #3 data run) as explained in Step 37 of the Lab 3 Document.
- Question: Please paste (in text file format) your CaC2 freezing point data table (test tube #4 data run) as explained in Step 37 of the Lab 3 Document.
- Question: Not available
- Question: Recall the molar mass of a substance is expressed in g/mol. If we have a mass of a substance, and we know how many moles of it we have in that given mass, we can divide g/mol to determine the molar mass. So, using your experimental data from Table 1 and your answer to the previous question, calculate the molar mass for each solute. You must show all work to receive credit.
- Question: Calculate the percent error for your experimental values for each solute. Is your percent error value relatively constant with each trial? If so, what might this indicate (including accuracy and precision as part of your answer)? You must show all work to receive credit.
- Question: Not available
- Question: Which solution of salt (NaCI or CaC2) may be better to salt the roads? Why? (HINT: Don’t just focus on the final freezing point in each case ---- consider all your data and how it may be tied to efficiency and economic factors.) CaCl2 can achieve freezing point depression with approximately 38% less mass of solution, this is more economical than using NaCl. But I feel like the temperature in the location should be considered as well because NaCl achieved a larger change in freezing point depression by 2.3 degrees Celsius.
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