Laboratory Short Lab Report Guidelines: Stoichiometry

General Requirements

• ONE page (front/back) must be submitted.
• If you have chosen to submit this lab report as a team, both student lab data sheets must be attached to the document.
• No cover page is needed.

Front Page: Data and Results

• Use the original lab data sheet (the one completed during the lab session and signed by the instructor) as your data table
• Complete the table fully, including your full name, the date, and your lab section.
• Your final answer and %yield must be written with the correct number of significant figures (if not -10%)
• Write the balanced chemical equation, specifying all states of matter.

Sample Calculations

Perform the following calculations on the lab data sheet at the bottom of the page after the data. No need to type these calculations:

1. From the mass of Na₂CO₃ used, calculate the theoretical yield of NaCl (expected amount).
2. Using the mass of NaCl collected (actual yield), calculate the % yield for the reaction.

Note: If your % yield is less than 90% or over 100%, provide one relevant explanation for your result.

Back Page: Answer the Questions

No need to answer pre-lab and post-lab questions from the lab manual.

Lab Question: to be answered at the back of the data sheet.

Consider the following unbalanced equation:

Na₂CO₃ + HCl → NaCl + CO₂ + H₂O

Question: If a student uses 0.4224 g of sodium carbonate for this reaction, what volume (mL) of CO₂ gas will be produced at STP if the %yield reaction is 98.0%?

Note:Submit your lab report at the beginning of the next lab period. There will be a 1 mark deduction for each math or calculation error. Late submissions incur a 20% penalty.