Podcast
Questions and Answers
How should the mass of copper metal at the end of the reactions compare to the starting mass of copper?
How should the mass of copper metal at the end of the reactions compare to the starting mass of copper?
The produced mass of copper should equal the starting mass of copper.
Which reaction in the set of copper reactions is an example of a decomposition?
Which reaction in the set of copper reactions is an example of a decomposition?
Cu(OH)2(s) Δ−→ CuO(s) + H2O(g)
When working in a fume hood, what is the best position of the hood sash?
When working in a fume hood, what is the best position of the hood sash?
As low as possible, no more than halfway up
When is the best time to clean glassware during the lab session?
When is the best time to clean glassware during the lab session?
Convert 7860 feet to miles: 7860 feet × ( A ) / ( B ). What do A and B represent and how many miles?
Convert 7860 feet to miles: 7860 feet × ( A ) / ( B ). What do A and B represent and how many miles?
Convert 0.565 miles to feet: 0.565 miles × ( C ) / ( D ). What do C and D represent and how many feet?
Convert 0.565 miles to feet: 0.565 miles × ( C ) / ( D ). What do C and D represent and how many feet?
How many kilometers is 2584.5 cm?
How many kilometers is 2584.5 cm?
Perform the calculation, rounding your answer to the proper number of significant figures: 0.384 + 5.28 + 15.0007 = ?
Perform the calculation, rounding your answer to the proper number of significant figures: 0.384 + 5.28 + 15.0007 = ?
Perform the calculation, rounding your answer to the proper number of significant figures: 0.982 x 4.71 x 8.3 = ?
Perform the calculation, rounding your answer to the proper number of significant figures: 0.982 x 4.71 x 8.3 = ?
Perform the calculation, rounding your answer to the proper number of significant figures: 0.867 + 3.72 + 18.0045 = ?
Perform the calculation, rounding your answer to the proper number of significant figures: 0.867 + 3.72 + 18.0045 = ?
Perform the calculation, rounding your answer to the proper number of significant figures: 0.8730 ÷ 9.650 = ?
Perform the calculation, rounding your answer to the proper number of significant figures: 0.8730 ÷ 9.650 = ?
A graduated cylinder contains 10.00 mL water. A 14.74 g piece of aluminum is added to the water, and the volume rises to 15.46 mL. What is the density of the aluminum in g/mL?
A graduated cylinder contains 10.00 mL water. A 14.74 g piece of aluminum is added to the water, and the volume rises to 15.46 mL. What is the density of the aluminum in g/mL?
A 24.5 g sample of solution has a density of 0.768 g/mL. What is the sample volume (in mL)?
A 24.5 g sample of solution has a density of 0.768 g/mL. What is the sample volume (in mL)?
A block has a mass of 4.465 g and a volume of 143.2 cm3. Calculate the density in g/cm3.
A block has a mass of 4.465 g and a volume of 143.2 cm3. Calculate the density in g/cm3.
A 2.69 g piece of zinc (density = 7.14 g/mL) is added to a graduated cylinder that contains 12.13 mL H2O. What will be the final volume reading on the graduated cylinder, in mL?
A 2.69 g piece of zinc (density = 7.14 g/mL) is added to a graduated cylinder that contains 12.13 mL H2O. What will be the final volume reading on the graduated cylinder, in mL?
A series of measurements in the lab led to an experimental result of 32.9 mL, with a calculated standard deviation of 0.3 mL. What is the standard way to report this result?
A series of measurements in the lab led to an experimental result of 32.9 mL, with a calculated standard deviation of 0.3 mL. What is the standard way to report this result?
What is the last step of any spill cleanup procedure?
What is the last step of any spill cleanup procedure?
Which steps are necessary for cleaning a spill involving broken glass? (Select one or more)
Which steps are necessary for cleaning a spill involving broken glass? (Select one or more)
Syringe tips __________
Syringe tips __________
Unused solid reagent __________
Unused solid reagent __________
Titrant solution __________
Titrant solution __________
Broken flask ____________
Broken flask ____________
When should you start a new chemical waste container in the lab?
When should you start a new chemical waste container in the lab?
Which chemical waste situation should always be supervised or performed by an instructor?
Which chemical waste situation should always be supervised or performed by an instructor?
What are the best practices for safely handling waste in the lab? (Select one or more)
What are the best practices for safely handling waste in the lab? (Select one or more)
What should you do after finishing work with a reagent bottle? (Select one or more)
What should you do after finishing work with a reagent bottle? (Select one or more)
In general, which characteristics are necessary for a location to be suitable for chemical storage? (Select one or more)
In general, which characteristics are necessary for a location to be suitable for chemical storage? (Select one or more)
Identify the types of information that are necessary to communicate with emergency responders. (Select one or more)
Identify the types of information that are necessary to communicate with emergency responders. (Select one or more)
What is the first step for response to an emergency situation?
What is the first step for response to an emergency situation?
What does each color of the NFPA diamond represent? Yellow __________, Blue __________, White __________, Red __________.
What does each color of the NFPA diamond represent? Yellow __________, Blue __________, White __________, Red __________.
The green sign with an eye represents what?
The green sign with an eye represents what?
What does the sign with a red border and a black cylinder icon represent?
What does the sign with a red border and a black cylinder icon represent?
What is the diamond sign?
What is the diamond sign?
What is the main precaution to take if a Gas Cylinder sign is present in the lab?
What is the main precaution to take if a Gas Cylinder sign is present in the lab?
When should lab participants look at the Safety Data Sheet (SDS) of a substance?
When should lab participants look at the Safety Data Sheet (SDS) of a substance?
Read the Safety Data Sheet (click SDS icon below) of hydrogen peroxide to identify the recommended way to store this substance.
Read the Safety Data Sheet (click SDS icon below) of hydrogen peroxide to identify the recommended way to store this substance.
How to turn on the shower if chemicals spill on you or clothing?
How to turn on the shower if chemicals spill on you or clothing?
In case of accidental contact with chemicals, how long should the eyes be flushed at the eyewash station?
In case of accidental contact with chemicals, how long should the eyes be flushed at the eyewash station?
Under what conditions should a student inform the instructor of a lab injury?
Under what conditions should a student inform the instructor of a lab injury?
How to change gloves?
How to change gloves?
Which PPE matches best with the incident: While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench?
Which PPE matches best with the incident: While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench?
Which PPE matches best with the incident: While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor?
Which PPE matches best with the incident: While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor?
Which PPE matches best with the incident: While picking up a buret, an unknown solution left by a previous solution drips onto your hand?
Which PPE matches best with the incident: While picking up a buret, an unknown solution left by a previous solution drips onto your hand?
Which PPE matches best with the incident: While checking on a stirring solution, the solution splashes up towards your face?
Which PPE matches best with the incident: While checking on a stirring solution, the solution splashes up towards your face?
Determine when to put on disposable gloves for work in the lab.
Determine when to put on disposable gloves for work in the lab.
Determine when you should remove your goggles in the lab room.
Determine when you should remove your goggles in the lab room.
Steps to clean up a liquid spill:
Steps to clean up a liquid spill:
What information does not need to be included on a chemical waste label?
What information does not need to be included on a chemical waste label?
Which is NOT a good source of information about the hazards that affect waste disposal in a chemistry lab?
Which is NOT a good source of information about the hazards that affect waste disposal in a chemistry lab?
What are the best practices for safely handling waste in the lab? (Select one or more)
What are the best practices for safely handling waste in the lab? (Select one or more)
A student removes a chemical sample from a reagent bottle to be used in an experiment. What should he do with any excess chemical remaining from this sample after the experiment is complete?
A student removes a chemical sample from a reagent bottle to be used in an experiment. What should he do with any excess chemical remaining from this sample after the experiment is complete?
What information is needed in order to be prepared for an emergency? (Select one or more)
What information is needed in order to be prepared for an emergency? (Select one or more)
What is the main precaution to take if a Gas Cylinder sign is present in the lab?
What is the main precaution to take if a Gas Cylinder sign is present in the lab?
Which types of signs are posted to convey information about chemical storage? (Select one or more)
Which types of signs are posted to convey information about chemical storage? (Select one or more)
Which signs are typically posted in areas of active lab work? (Select one or more)
Which signs are typically posted in areas of active lab work? (Select one or more)
What should you do every time you are about to heat glassware on a hot plate? (Select one or more)
What should you do every time you are about to heat glassware on a hot plate? (Select one or more)
Steps to boil solution on a hot plate.
Steps to boil solution on a hot plate.
While setting up a beaker on a hot plate and the stirring becomes erratic, what do you do?
While setting up a beaker on a hot plate and the stirring becomes erratic, what do you do?
Which procedure cannot be performed on a hot plate, requiring a Bunsen burner instead?
Which procedure cannot be performed on a hot plate, requiring a Bunsen burner instead?
When using a properly stabilized balance, how should you ensure that you get the most accurate mass reading possible?
When using a properly stabilized balance, how should you ensure that you get the most accurate mass reading possible?
Identify which balance was used to make each mass reading.
Identify which balance was used to make each mass reading.
What action is NOT necessary before lighting a Bunsen burner?
What action is NOT necessary before lighting a Bunsen burner?
Blue flame, you should __________ the __________ further.
Blue flame, you should __________ the __________ further.
To increase the size of the flame, you should __________ the __________ further.
To increase the size of the flame, you should __________ the __________ further.
Relative order of the metric prefixes of kilo-, micro-, centi-, and milli.
Relative order of the metric prefixes of kilo-, micro-, centi-, and milli.
Addition and subtraction significant figures.
Addition and subtraction significant figures.
What is the purpose of stirring a solution while it is being heated?
What is the purpose of stirring a solution while it is being heated?
When a vinegar and oil salad dressing separates into two layers, the oil floats on top of the vinegar. The density of the oil ____________ the density of the vinegar.
When a vinegar and oil salad dressing separates into two layers, the oil floats on top of the vinegar. The density of the oil ____________ the density of the vinegar.
In order to use a pipet, place a __________ at the top of the pipet. Use this object to fill the pipet such that the __________ of the liquid is even with the volume line. Release the liquid, touching the tip of the pipet to the side of the container if necessary to release the last drop __________ the pipet tip.
In order to use a pipet, place a __________ at the top of the pipet. Use this object to fill the pipet such that the __________ of the liquid is even with the volume line. Release the liquid, touching the tip of the pipet to the side of the container if necessary to release the last drop __________ the pipet tip.
The separation of the components of a mixture is based upon the fact that each component has different __________ properties. The components of a mixture are separated based on their __________ properties.
The separation of the components of a mixture is based upon the fact that each component has different __________ properties. The components of a mixture are separated based on their __________ properties.
Each of the substances in the mixture retains its __________ identity. Mixtures are separable into these components by __________ means.
Each of the substances in the mixture retains its __________ identity. Mixtures are separable into these components by __________ means.
Most of the __________ people encounter in everyday life consists of __________ of different substances.
Most of the __________ people encounter in everyday life consists of __________ of different substances.
Whereas __________ substances have __________ the compositions, the composition of __________ can vary.
Whereas __________ substances have __________ the compositions, the composition of __________ can vary.
Sublimation is a phase change from __________ to __________. The __________ phase is not present in this change.
Sublimation is a phase change from __________ to __________. The __________ phase is not present in this change.
What type of separation technique needs to be used when a solvent is added to dissolve only one mixture component and then the liquids are separated?
What type of separation technique needs to be used when a solvent is added to dissolve only one mixture component and then the liquids are separated?
What type of separation technique needs to be used when a liquid is carefully poured out, leaving the solid behind in the container?
What type of separation technique needs to be used when a liquid is carefully poured out, leaving the solid behind in the container?
What type of separation technique needs to be used when a solid is caught on paper or a membrane while the liquid passes through?
What type of separation technique needs to be used when a solid is caught on paper or a membrane while the liquid passes through?
What type of separation technique needs to be used when a solid mixture is heated and one component transitions directly between solid and gas?
What type of separation technique needs to be used when a solid mixture is heated and one component transitions directly between solid and gas?
What are the substances making up a mixture called?
What are the substances making up a mixture called?
This is the process of separating a liquid from a solid (sediment) by gently pouring the liquid from the solid so as not to disturb the solid.
This is the process of separating a liquid from a solid (sediment) by gently pouring the liquid from the solid so as not to disturb the solid.
How can a solid dissolved in water be separated from the water?
How can a solid dissolved in water be separated from the water?
Which process is used to separate soluble compounds from insoluble compounds?
Which process is used to separate soluble compounds from insoluble compounds?
This is the process of separating a solid from a liquid by means of a porous material.
This is the process of separating a solid from a liquid by means of a porous material.
The composition of heterogeneous mixtures is __________.
The composition of heterogeneous mixtures is __________.
The composition of homogeneous mixtures is __________.
The composition of homogeneous mixtures is __________.
What are minor components in a mixture called?
What are minor components in a mixture called?
Sublimation is a phase change from solid to a gas without going through a liquid phase.
Sublimation is a phase change from solid to a gas without going through a liquid phase.
A solvent is added to dissolve only one mixture component and then the liquids are separated.
A solvent is added to dissolve only one mixture component and then the liquids are separated.
A liquid is carefully poured out, leaving the solid behind in the container.
A liquid is carefully poured out, leaving the solid behind in the container.
A solid is caught on paper or a membrane while the liquid passes through.
A solid is caught on paper or a membrane while the liquid passes through.
A solid mixture is heated. One component transitions directly between solid and gas.
A solid mixture is heated. One component transitions directly between solid and gas.
Study Notes
Spill Cleanup and Waste Disposal
- Final step in spill cleanup: Wipe down affected area with detergent and water.
- Broken glass cleanup: Stop spill spread, soak liquid, and pick up large glass pieces with gloves.
- Waste type disposal: Syringe tips in sharps container, solid reagents in solid waste, titrant in a Nalgene bottle, broken flasks in puncture-resistant bags.
Chemical Waste Containers and Handling
- Start a new waste container when contents are a couple inches below the brim.
- Supervising chemical waste cleanup is crucial, especially for hazardous materials like mercury.
Safety Procedures and Equipment
- Always wear appropriate Personal Protective Equipment (PPE) like gloves and goggles.
- Personalize safety practices: close reagent bottles, return them post-use, and check labels before disposal.
Emergency Procedures and First Aid
- Emergency response begins with gathering information calmly.
- Flushing eyes at an eyewash station should last for 15 minutes for chemical contact.
Signage and Chemical Storage
- NFPA diamond colors: Yellow (reactivity), Blue (health), Red (fire), White (special hazards).
- Appropriate storage environments for chemicals: well-ventilated, dry, and dark areas.
Equipment and Technique Usage
- Regularly check glassware for damage before heating.
- Ensure Bunsen burner hoses have no leaks before lighting, and clear flammable materials.
Separation Techniques
- Mixtures are separated based on physical properties: extraction (dissolving one component), decantation (pouring liquid off), filtration (trapping solids with barriers), sublimation (direct solid-to-gas).
Densities and Measurements
- Density calculations involve measuring mass and volume, using extracted volume changes from solid displacements in liquids.
Metric Conversions and Calculations
- Keep track of unit conversions: example from feet to miles or cm to kilometers.
- Significant figures are essential in all calculations, governed by the least precise measurement.
Best Practices in Chemistry Labs
- Change gloves frequently to reduce chemical exposure.
- Maintain clear communication of hazards and ensure all lab members understand emergency protocols.
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Description
Test your knowledge on cleanup procedures in the chemistry lab with this quiz. Understand the correct sequence of actions required for safe disposal and management of spills, particularly involving hazardous materials like broken glass. Perfect for students and laboratory personnel alike.
