PURPOSE OF LABORATORY • ILLUSTRATE AND PARTICIPATE IN SCIENTIFIC INQUIRY • DEMONSTRATE CHEMICAL FACTS AND PRINCIPLES • DEVELOP LABORATORY SKILLS • ACTIVE LEARNING PROCESS • BUILD YOUR CONFIDENCE • LEARN AND BUILD LAB SAFETY SKILLS
SYLLABUS • See link from Chem 1151 course page. • GTAs Dinara Gunasekera and Matt Tjosass • You must have a U card with a balance of at least $25.00 before checking into lab. • Bring your lab packet and Lab Notebook every lab day.
SYLLABUS (2) • 20% of Chem 1151 grade 150 Lab Points = 120 points for lab reports + 30 points for Lab Notebook. • Makeup lab is June 28 with all reports by June 30 (correct syllabus).
SYLLABUS (3) • Students who are repeating this course and have successfully completed the lab must see the instructor. • Students must pass lecture and lab separately to pass Chem 1151.
SYLLABUS (4) • SAFETY SAFETY SAFETY • Goggles must be worn at all times after pre-lab and before post-lab work. • KEEP A CLEAN AND ORDERLY LAB • Shorts, short skirts or sandals are not allowed in lab.
SCHEDULE OF EXPTS • See link from Chem 1151 course page. • GTA will check Pre-Lab Assignment • Pre-Lab Lecture, Questions • Lab group performs experiment(s) • Lab group completes analysis, calculations, questions, graphing • GTA signs Lab Notebook before each student leaves
LAB NOTEBOOK • See link from Chem 1151 course page. • The Lab Notebook is an original, complete and historical record of what you did in lab. • Write in ink. • Record data, observations, equipment information, accidents, errors, questions. • Pre-lab assignment, Analysis, Post-lab assignment, rough graphs, calculations
PRE-LAB ASSIGNMENT • The purpose is to help you prepare for lab. • The assignment consists of reading the lab handout, preparing your Lab Notebook and completing the actual Pre-Lab Assignment. • Students who fail to complete this work prior to the start of lab will not be allowed in lab that day. These students must complete the Makeup Lab on June 28.
PRE-LAB ASSIGNMENT (2) • May 19: Chap 1, Prob 73a convert to m, Prob 73d convert to m/s, Prob 73f convert to m2 • May 24: • Describe how to make 30 mL of 1.0M HCl from 6.0 M HCl stock solution. • Calculate the final temperature when 26.0 mL of water at 83 oC is mixed with 18.0 mL of water at 27 oC.
LAB REPORT • See link from Chem 1151 course page. • A lab report is due one week after the expt was performed except the June 28 make-up lab is due on June 30.
MOLARITY • A binary solution contains a solvent (major component) and a solute. • The concentration of a solution can be described quantitatively by its molarity. • Molarity = M = mol solute/L soln = mol/V • Note that # mol solute = MV
MOLARITY (2) • Dilution is governed by the conservation of moles solute in the concentrated solution and in the dilute solution. • Mols solute in conc. = Mols solute in dil. • M1V1 = M2V2 = constant • Starting with a 4.0 M concentrated NaOH solution, prepare 25.0 mL of a 1.5 M soln. • 4.0M(V1) = 1.5M (25.0 mL) or V1 = 9.375 mL 4.0 M NaOH
NEXT • Safety Tape • Safety Quiz • Move to lab in Chem 301 • Tour of lab • Using the top loading balance, reading a buret, etc • Check into lab