MAKE ME SOME SALT!!!
LAB REPORT GUIDELINES: 1,2,3,4,5,6,7,9,10,11,12
PURPOSE:
To use your knowledge of reactions, moles, and stoichiometry to make 2.00 grams of salt.
INTRODUCTORY MATERIAL AND CALULATIONS:
What is concentration?
The Stoichiometry Road Map – adding solutions to the map. Welcome to solution stoichiometry!
How many grams of Magnesium would be needed to completely react with 50.0 mL of 6.0 M
HCl ?
What is percent yield? What is the limiting reactant? What is the excess reactant?
In your Intro section, you must determine the amount of each reactant needed before you can
begin. You must complete 2 calculations before performing the lab! Show them to your
instructor before proceeding. Hint: You need to use the Stoichiometry Road Map with solutions
included.
Label all calculations. Tell me what you are calculating!!
MATERIALS:
Sodium carbonate, 3.00 M hydrochloric acid, balance, graduated cylinder, ring stand, ring clamp,
wire gauze or clay triangle, Bunsen burner, evaporating dish, watch glass.
PROCEDURE:
Procedure must include all materials above underlined. Big hints: 1) add hydrochloric acid very
slowly; 2) excess HCl dissipates as a gas, so be sure to add an extra 5 mL of 3.00 M HCl.
DATA:
Don’t forget anything.
CALCULATIONS:
Most of your calculations are in the Intro section.
However, you do need to quickly calculate how much salt you recovered. Show the work.
QUESTIONS: (actually just more calculations)
1) Calculate the mass of water produced in this lab.
2) Calculate the volume of carbon dioxide gas produced in this lab. Assume STP.
3) Which of the two reactants in this lab was the limiting reactant? Which was the excess
reactant? Explain.
4) What mass of the limiting reactant remains unreacted after the reaction is complete?
5) What volume of the excess reactant remains unreacted after the reaction is complete?
6) What is the concentration of the excess reactant after the reaction is complete (before you
began heating)?
Assume the final volume is identical to the measured volume of solution.
ERROR ANALYSIS:
Calculate the percent yield and percent error for your results. Discuss possible sources of error
and their effects on your lab.
CONCLUSION:
Write a conclusion which demonstrates that you understand what you did. How did you
accomplish the purposes? Discuss the math as well.
Remember, here is a great guide for writing your conclusion:
1) Restate the purpose
2) Summarize the procedure and data collection
3) Discuss any important principles / equations used
4) Explain the graphs and/or math
5) Report your results
Also, please include any other interesting information you would like to add.
LAB REPORT GUIDELINES: 1,2,3,4,5,6,7,9,10,11,12