Podcast
Questions and Answers
Why is it important to close the flask with a cork after adding the potassium iodide solution?
Why is it important to close the flask with a cork after adding the potassium iodide solution?
- To prevent any loss of mass due to escaping gases during the reaction. (correct)
- To ensure complete mixing of the solutions.
- To maintain a constant temperature inside the flask.
- To prevent the lead nitrate from reacting with the air.
In this experiment, what visible evidence suggests that a chemical reaction has occurred?
In this experiment, what visible evidence suggests that a chemical reaction has occurred?
- The release of gas bubbles.
- The change in temperature of the solution.
- The change in the mass of the flask.
- The formation of a yellow precipitate. (correct)
Which of the following is the most important factor in ensuring the accuracy of this experiment?
Which of the following is the most important factor in ensuring the accuracy of this experiment?
- Using a precise amount of distilled water.
- Preventing any loss or gain of mass from the flask during the experiment. (correct)
- Using the same conical flask for both solutions.
- Ensuring the solutions are at room temperature.
What type of reaction is expected to occur between lead nitrate and potassium iodide?
What type of reaction is expected to occur between lead nitrate and potassium iodide?
What is the purpose of weighing the flask and its contents both before and after mixing the solutions?
What is the purpose of weighing the flask and its contents both before and after mixing the solutions?
If the weight of the flask and contents appears to increase slightly after mixing, what is the most likely reason, assuming the law of conservation of mass still holds true?
If the weight of the flask and contents appears to increase slightly after mixing, what is the most likely reason, assuming the law of conservation of mass still holds true?
What is the role of distilled water in preparing the lead nitrate and potassium iodide solutions?
What is the role of distilled water in preparing the lead nitrate and potassium iodide solutions?
Why is a spring balance used in this experiment?
Why is a spring balance used in this experiment?
What would be the consequence of not using distilled water in this experiment?
What would be the consequence of not using distilled water in this experiment?
What safety precaution should be taken when handling lead nitrate?
What safety precaution should be taken when handling lead nitrate?
In the procedure, the solutions are tilted and swirled. What is the primary reason for this?
In the procedure, the solutions are tilted and swirled. What is the primary reason for this?
Assuming the experiment is performed perfectly, what should be the relationship between the weight of the reactants and the weight of the products?
Assuming the experiment is performed perfectly, what should be the relationship between the weight of the reactants and the weight of the products?
What is the purpose of using a retord stand in this experiment?
What is the purpose of using a retord stand in this experiment?
If the yellow precipitate doesn't form, what could be a likely reason?
If the yellow precipitate doesn't form, what could be a likely reason?
What does this experiment demonstrate about chemical reactions in a closed system?
What does this experiment demonstrate about chemical reactions in a closed system?
Besides lead nitrate and potassium iodide, which other compound is produced as a result of the reaction?
Besides lead nitrate and potassium iodide, which other compound is produced as a result of the reaction?
What is the chemical formula for lead nitrate?
What is the chemical formula for lead nitrate?
What is the chemical formula for potassium iodide?
What is the chemical formula for potassium iodide?
Flashcards
Experiment Aim
Experiment Aim
To determine if mass changes before and after a chemical reaction.
Observed Reaction
Observed Reaction
Lead nitrate and potassium iodide mix creating a yellow precipitate.
Experiment Result
Experiment Result
A chemical reaction where mass is conserved.
Experiment Overview
Experiment Overview
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Mass Conservation
Mass Conservation
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Law of Conservation of Mass
Law of Conservation of Mass
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Dissolving
Dissolving
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Precipitate
Precipitate
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Reactants
Reactants
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Study Notes
- The FE exam is the first step to becoming a professional licensed engineer (PE).
- The exam is for recent graduates and students near undergraduate engineering degree completion.
- It's a computer-based test, available year-round at Pearson VUE centers.
- Examinees have 6 hours, including agreements, tutorials, a break, and a survey.
- The actual exam is 5 hours and 20 minutes and includes 110 questions.
- Question types include multiple-choice, fill-in-the-blank, and other formats.
- A closed-book exam, an electronic reference handbook with formulas is provided.
- Graded pass/fail, and NCEES determines the passing score statistically.
Exam Day Logistics
- Arrive 30 minutes early for check-in.
- Bring two valid government-issued IDs with matching names.
- Personal items like cell phones and calculators are prohibited.
Exam Content
- Covers a wide range of engineering topics varying by discipline.
- Topics include Mathematics, Probability and Statistics, Computational Tools, Ethics and Professional Practice, and Engineering Economics.
- Also covers Electricity and Magnetism, Statics, Dynamics, and Mechanics of Materials.
- Fluid Mechanics, Thermodynamics, and Heat Transfer are on the exam.
- Material Properties and Processing, Computer Networks, Software Engineering, and Instrumentation and Data Acquisition are included.
Exam Strategies
- Familiarize yourself with the FE Supplied Reference Handbook before the exam.
- Practice solving problems from previous exams.
- Manage time wisely, aiming for about 3 minutes per question.
- Read questions carefully to understand what is being asked.
- Eliminate incorrect answer choices when unsure.
- Guess if necessary, as there is no penalty for guessing.
Registration
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- Create an account and pay the exam fee.
- After registering, instructions for scheduling at a Pearson VUE test center will be emailed.
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