Chemistry Honors – Class 41 & Class 42

The Gooch!

Dates

• Period A: Friday, April 4th / Monday April 7th
• Period C: Friday, April 4th / Monday April 7th
• Period D: Friday, April 4th / Tuesday, April 8th

Lab – Analysis of an Alloy

• Day 1 – Precipitation
  • Collect Textbook HW
  • THEORY – Gotta know how to predict the amount of NaCl needed
  • SAFETY – Neutralize acid spills with NaHCO3
  • SAFETY – Conduct reaction in the hood
  • SAFETY – Always transfer materials to your lab table
  • At the end of period you will leave labeled beaker covered in hood
• Day 2 – Filtration & Mass
  • Complete filtration during class
  • Leave crucible to dry in the oven
  • NOTE – you must obtain final mass before next class meeting (after school? OH?)

Homework

• Make sure all of your pre-lab and prep are done properly
• All calculations due in LNB by the start of class 43 (Tue-Wed)
• NOTE – known value = 90.0% Silver in alloy (use this for percent error calculation)
• NOTE – copying answers to pre-lab questions from the Internet is not cool and leads to lab quizzes during class
• NOTE – sending information to classmates regarding the answers to lab questions is considered plagiarism

Lab Quiz

• Period A – Thursday
• Periods C, D – Wednesday
• Covered topics = lab reactions, lab calculations, lab theory, lab observations, lab procedure
• NOTE – make sure you know the correct theory and reactions