Laboratory Assessment Overview
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Questions and Answers

What is the main purpose of grades as seen by instructors?

  • To categorize students into ability groups
  • To reflect student knowledge and understanding (correct)
  • To provide students with a financial incentive
  • To ensure students feel pressure to perform

What happens if a student submits work that is not original?

  • They will be asked to redo the assignment without penalty
  • They could be exempted from future penalties
  • They will receive a warning but no penalties
  • They face a grade of zero for that work section (correct)

How must you present information you have researched in your work?

  • By paraphrasing and properly acknowledging the original sources (correct)
  • By rewriting the information in the same format as the source
  • By summarizing all sources in a single paragraph
  • By quoting word for word from the sources

Which of the following is considered academic misconduct?

<p>Copying from another student's work (D)</p> Signup and view all the answers

What is a common penalty for a serious academic offense?

<p>A grade of zero on the related course element (D)</p> Signup and view all the answers

Why is it important to reference paraphrased ideas?

<p>To acknowledge the original source and avoid plagiarism (D)</p> Signup and view all the answers

What should be avoided when writing a lab report?

<p>Having any similarities with another student's report (D)</p> Signup and view all the answers

Students sometimes find it challenging to evaluate the validity of information found online. What can be a consequence of using unethical resources?

<p>Being subjected to academic penalties as per policy (A)</p> Signup and view all the answers

What is the importance of submitting the Experimental Procedure Summary (EPS)?

<p>It is necessary for performing the experiment without the lab manual. (B)</p> Signup and view all the answers

How long before the scheduled laboratory period must the pre-lab assignment be submitted?

<p>At least 24 hours before the scheduled lab period. (C)</p> Signup and view all the answers

What percentage of the total grade does the final exam account for?

<p>40% (C)</p> Signup and view all the answers

What is required for each experiment in CHEM 1200?

<p>A post-lab report prepared for grading. (C)</p> Signup and view all the answers

What must you be cautious about when submitting the pre-lab assignments?

<p>You should not submit until you are ready for grading. (D)</p> Signup and view all the answers

Which of the following formats is acceptable for the Experimental Procedure Summary (EPS)?

<p>Handwritten in point form, flow charts, or diagrams. (A)</p> Signup and view all the answers

What should you do if you want to start working on your pre-lab assignment?

<p>Start working immediately after it becomes active. (D)</p> Signup and view all the answers

Which core value is NOT part of the academic integrity identified at the University of Waterloo?

<p>Creativity (A)</p> Signup and view all the answers

What is the immediate first aid treatment for chemicals that have splashed onto the skin?

<p>Flush the area with large quantities of tap water (D)</p> Signup and view all the answers

What should you do if a chemical enters your eye during a laboratory procedure?

<p>Flush the eye with water for a minimum of 10 minutes (C)</p> Signup and view all the answers

Which action is NOT recommended when handling chemicals in the laboratory?

<p>Handling multiple chemicals at once to save time (D)</p> Signup and view all the answers

In case of a fire alarm in the chemistry lab, what is the first step you should take?

<p>Turn off all services (gas, electricity, and water) before leaving (A)</p> Signup and view all the answers

Which of the following is crucial for ensuring safety when working with hazardous materials?

<p>Being familiar with the locations of emergency equipment (B)</p> Signup and view all the answers

Who should be informed immediately after flushing a chemical off the skin or out of the eye?

<p>The instructor or TA (C)</p> Signup and view all the answers

What is a recommended safety measure when using a fume hood?

<p>Keep materials at least six inches inside the hood (C)</p> Signup and view all the answers

Which of the following should be reported immediately to the instructor or TA?

<p>An accident involving a chemical spill (B)</p> Signup and view all the answers

What is the correct procedure for adding acid to water?

<p>Pour acid into water while agitating. (D)</p> Signup and view all the answers

What should you do if a chemical spill occurs?

<p>Flush the chemicals off the bottle and notify the instructor. (D)</p> Signup and view all the answers

Which method is acceptable for sampling a gas by odor?

<p>Fan some gas toward your nose after filling your lungs with air. (D)</p> Signup and view all the answers

What is the proper way to dispose of excess chemicals after an experiment?

<p>Dispose of them in specially provided waste containers. (A)</p> Signup and view all the answers

Why should unlabelled chemicals not be used?

<p>They may have different properties than expected. (C)</p> Signup and view all the answers

What should always be done immediately after using a chemical container?

<p>Recap or stopper the container immediately. (A)</p> Signup and view all the answers

How should chipped or broken glassware be disposed of?

<p>Place it in specially marked 'Glass Waste' containers. (A)</p> Signup and view all the answers

What is the safest way to heat flammable liquids?

<p>Use an electric heating mantle or steam bath. (B)</p> Signup and view all the answers

How many different sizes of Griffin beakers are listed in the equipment list?

<p>6 (B)</p> Signup and view all the answers

What is the procedure to follow if equipment is missing during the locker check-out?

<p>Purchase the missing equipment from the storeroom. (B)</p> Signup and view all the answers

What type of report is required after completing the experiment?

<p>Modified formal report (C)</p> Signup and view all the answers

Which piece of equipment is NOT included in the locker equipment list?

<p>Plastic pipette (C)</p> Signup and view all the answers

Which of the following techniques is emphasized for review before the laboratory?

<p>Quantitative transfer (A)</p> Signup and view all the answers

What will students receive after returning their locker key to the TA?

<p>A signed check-out slip (B)</p> Signup and view all the answers

Which equipment listed is primarily used for heating substances?

<p>Bunsen burner (C)</p> Signup and view all the answers

Which of the following is NOT one of the learning outcomes for the experiment?

<p>Ability to perform qualitative analysis (A)</p> Signup and view all the answers

What characterizes a single displacement reaction?

<p>Exchange of one component between a compound and an element. (C)</p> Signup and view all the answers

Which equation correctly represents a double displacement reaction?

<p>NaCN + HBr → NaBr + HCN (B)</p> Signup and view all the answers

What is the purpose of calculating percent yield in a chemical reaction?

<p>To measure how much of the desired product is obtained. (B)</p> Signup and view all the answers

In the context of green chemistry, what does percent atom economy assess?

<p>The mass of the desired product in relation to the total mass of reactants. (C)</p> Signup and view all the answers

Which item is NOT collected using the blue requisition slips from the Storeroom?

<p>Bunsen burner (A)</p> Signup and view all the answers

What should first-year students use for all experiments in the chemistry lab?

<p>De-ionized (DI) water (A)</p> Signup and view all the answers

Which formula is used to calculate percent yield?

<p>% yield = actual yield (g) / theoretical yield (g) x 100% (A)</p> Signup and view all the answers

What is a characteristic of a neutralization reaction?

<p>Formation of salt and water from an acid and a base. (B)</p> Signup and view all the answers

Flashcards

Academic Misconduct

Submitting work that is not your own original work.

Plagiarism

Using someone else's words or ideas without giving proper credit.

Copying Work

Submitting work identical or substantially similar to another student's work.

Unethical Resources

Using online resources that offer dishonest or incomplete help with assignments, like 'expert' answers or copies of others' work.

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Lab Reports

Assignments in lab classes requiring individual, original work.

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Citations

Formal acknowledgment of sources used in your writing.

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References

Full details of sources used in a report or assignment

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Academic Integrity

Completing your work through honest effort and original thought.

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Pre-lab assignments

Assignments completed before lab sessions, accessed 7 days before lab, and due 24 hours before.

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EPS (Experimental Procedure Summary)

Handwritten summary of the lab procedure, excluding the manual. Graded part of the lab report.

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Pre-lab reports

Reports submitted after each lab experiment. Vary according to the experiment; see background information.

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Final exam

Comprehensive exam covering all course material, held during the exam period

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Lab report grade

The portion of your grade reflecting your pre-lab assignment and the post-lab report (EPS and other report sections).

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CHEM 1200

The specific chemistry course for which these rules apply.

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One submission allowance

Each pre-lab assignment permits only one submission.

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Chemical splash on skin treatment

Immediately flush the affected area with large quantities of water at the nearest sink, eyewash, or emergency shower. Inform your TA or instructor. Report to Health Services if irritation or pain develops.

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Chemical splash in the eye treatment

Immediately flush the eye with fresh water for at least 10 minutes. Locate the nearest eyewash. Inform your instructor. Report immediately to Health Services.

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Cuts, abrasions, or burns treatment

Report to your instructor or TA for treatment and dressing.

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Fire safety in labs

Know the locations of exits, fire extinguishers, alarms, showers, and blankets. In case of fire alarm, turn off utilities and leave immediately.

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Lab safety - fume hood use

Work in fume hoods when necessary and avoid touching chemicals to your face, eyes or body until washing your hands thoroughly.

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Lab safety - proper equipment

Use the appropriate equipment for each task, and ensure equipment is in good working order before use.

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General lab safety

Wash your hands frequently, and always wash before leaving the lab. Be aware of and avoid toxic vapors and gases.

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Emergency contact for major injury

Call 911 from any on-campus phone.

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Locker Check-Out

The process of returning lab equipment and receiving a check-out slip confirming all items are present and in good condition.

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Quantitative Transfer

The technique of moving liquids from one container to another without losing any of the substance.

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Vacuum Filtration

A method for separating solids from liquids using a vacuum to speed up the process.

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Fume Hood

A safety enclosure that ventilates hazardous fumes away from the user.

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Snorkel Exhaust Vent

A localized exhaust system that draws away vapors and gases.

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Decanting

Pouring off the liquid from a mixture, leaving the solid behind.

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Modified Formal Report

A type of lab report combining report sheets with a formal conclusion.

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Learning Outcomes

The skills and knowledge students should gain from an experiment.

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Chemical Handling

Chemicals can be toxic, flammable, or both. They should be handled with care in a ventilated hood to prevent exposure to vapors.

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Acid Dilution

Always add acid to water, never water to acid. This prevents heat generation and potential explosions.

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Chemical Storage

Chemicals that react to give off dangerous gases, cause fire, or explode should not be stored near each other.

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Waste Disposal

Chemicals should be disposed of in designated waste containers, never down the sink drain.

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Handling Glassware

Laboratory glassware is fragile and should be handled with care to avoid accidents.

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Broken Glassware

Chipped or broken glassware must be disposed of in designated 'Glass Waste' containers.

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Heating Flammable Liquids

Never use a gas flame or open flame to heat flammable liquids. Electric heating mantles or steam baths are safer alternatives.

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Cleaning Up Spills

All spills must be cleaned up immediately and the instructor notified. Spill kits are available for cleaning up large spills of acids or bases.

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Single Displacement Reaction

A chemical reaction where one element replaces another in a compound. The general form is AB + C → AC + B.

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Double Displacement Reaction

A chemical reaction where two elements or groups switch places in two reactants. The general form is AB + CD → AD + BC.

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Neutralization Reaction

A specific type of double displacement reaction where an acid reacts with a base to form a salt and water. The general form is AH + BOH → AB + H2O.

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Percent Yield

A measure of the actual amount of product obtained in a reaction compared to the theoretical maximum. Calculated as (actual yield / theoretical yield) x 100%.

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Atom Economy

A measure of the efficiency of a reaction considering the mass of desired product compared to the total mass of reactants. Calculated as (molar mass of product / molar masses of reactants) x 100%.

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Green Chemistry

A set of principles for designing chemical processes that minimize environmental impact and maximize efficiency.

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De-ionized Water (DI Water)

Water purified to remove ions and impurities, commonly used in chemistry labs.

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Evaporating Dish

A shallow, round dish used for evaporating liquids and concentrating solutions.

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Study Notes

Student Assessment

  • Final Grade Calculation:
    • Skill Development Exercise: 1%
    • Online pre-lab assignments (15 total, equally weighted): 20%
    • Laboratory work (practical): 40%
    • Lab Reports (5 total, equally weighted): 29%
    • Final Exam: 40%
  • Skill Development Exercise (First Day):
    • A hands-on exercise focused on common lab glassware & equipment.
    • Familiarizes students with lab layout & techniques.
    • Completed independently, not in pairs.
    • Assess student readiness for lab work.
    • Lab manual, course materials, and TAs are resources to use.
  • Laboratory Performance Mark:
    • 10% of the total grade.
    • Assesses punctuality, preparedness, lab practices, work ethic, technique, and attitude.
    • The cleanliness of the lab space is also evaluated.
    • Includes consideration of timely arrival, preparedness, efficiency, following safety rules, appropriate use of equipment, and successful collaboration with partners.

Pre-Laboratory Tasks

  • Pre-lab Assignments (PL):
    • 20% of total grade.
    • Online assignments based on material for upcoming experiments.
    • Address techniques, safety, and background information.
    • Access restricted; completed at least 24 hours before scheduled lab period.
    • Only one submission allowed.
  • Experimental Procedure Summary (EPS):
    • 10% of each report grade.
    • Handwritten, not computer-generated.
    • Includes all necessary information to perform the experiment without lab materials.
    • Format (flowchart, diagram, etc.) is flexible.
    • Graded as part of the lab report.
  • Pre-lab Reports:
    • 29% of total grade.
    • Required for each experiment.
    • Equally weighted (5.8% per report).
    • Report type specified for each experiment in the experiment background.
    • Full specifications in Appendix A.
  • Final Exam:
    • 40% of total grade.
    • Written, scheduled during exam period.
    • Covers all course material.
    • Required for credit in CHEM 1201.
    • Format and content details will be shared during the term.

Academic Integrity

  • Six core values: Honesty, trust, fairness, respect, responsibility, and courage.
  • Grades: Reflection of knowledge and understanding.
  • Academic misconduct: Subject to disciplinary penalties.
  • Penalties: Zero grade for the related course element and deduction of 5% of the course grade.

Safety and Handling

  • Safety Orientation/WHMIS Online Course:
    • Complete before lab work.
    • Certificate of completion required for lab access from instructor.
  • Lab Safety Gear:
    • Safety goggles/glasses required.
    • Approved “shielded” or “close-fitted” safety glasses are acceptable.
    • Closed-toe shoes required.
    • Lab coat recommended (not required.)
  • Preventing Accidents/Injury:
    • Carefully follow instructions.
    • Seek clarification.
    • Do not perform unauthorized experiments.
    • Clean spills immediately.
  • Chemical Handling:
    • Familiarize yourself with chemical properties.
    • Use appropriate equipment (fume hoods, etc.).
    • Proper disposal/cleaning of spills or broken glass.
  • Glassware Handling:
    • Identify and handle appropriate glassware.
    • Avoid use of chipped or cracked glassware.
  • Electronic Equipment:
    • Do not immerse electronics in water.
    • Maintain electrical cords from liquids.

Laboratory Procedures

  • Experiment 1: Reactions of Copper:
    • Details about techniques, like recording data, using balances, measuring accurately, and use of safety equipment, such as fume hoods.
    • Include details about reaction procedures (measurements of chemicals, glassware)
    • Steps are explained, with instructions for recording data, observations, and descriptions.
  • Classification of Reactions and Calculations (% Yield, % Atom economy):
    • Combination reaction
    • Deconposition reaction
    • Displacement reaction
  • Experiment 2: Preparation of a Reaction and Further Steps
    • Details about the preparation for different parts of reactions.
  • Experiment 3: Heating and Filtration
    • Use proper heating techniques.
    • Perform filtrations accurately.
  • Experiment 4: Converting Solutions
    • Conversion procedures and steps
    • Ensure that safety instructions are followed in these steps.

Locker Assignment

  • Locker Check-In:
    • Students work in pairs.
    • Get key requisition slip.
    • Obtain locker key.
  • Locker Equipment:
    • List provided of materials in locker.

Where to Get Help

  • Waterloo LEARN:
    • Announcements
    • Piazza discussion boards
  • Teaching Assistants (TAs):
    • Lab report preparation, grading of reports, course material, etc.
  • Course Instructor:
    • Information concerning personal issues or absence from class.

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CHEM 1200 Student Assessment PDF

Description

This quiz focuses on the student assessment criteria for a laboratory course, outlining how final grades are calculated. It details components such as lab reports, practical work, and skill development exercises aimed at enhancing student readiness for lab activities.

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