Chemistry Lab Spill Cleanup Quiz
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Questions and Answers

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?

Cu(OH)2(s) Δ−→ CuO(s) + H2O(g)

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?

<p>As soon as practical after use</p> Signup and view all the answers

Convert 7860 feet to miles: 7860 feet × ( A ) / ( B ). What do A and B represent and how many miles?

<p>A= 1 mile, B= 5280, answer=1.488</p> Signup and view all the answers

Convert 0.565 miles to feet: 0.565 miles × ( C ) / ( D ). What do C and D represent and how many feet?

<p>C= 5280, D=1 mile, answer=2983.2</p> Signup and view all the answers

How many kilometers is 2584.5 cm?

<p>0.025845</p> Signup and view all the answers

Perform the calculation, rounding your answer to the proper number of significant figures: 0.384 + 5.28 + 15.0007 = ?

<p>20.66</p> Signup and view all the answers

Perform the calculation, rounding your answer to the proper number of significant figures: 0.982 x 4.71 x 8.3 = ?

<p>38</p> Signup and view all the answers

Perform the calculation, rounding your answer to the proper number of significant figures: 0.867 + 3.72 + 18.0045 = ?

<p>22.59</p> Signup and view all the answers

Perform the calculation, rounding your answer to the proper number of significant figures: 0.8730 ÷ 9.650 = ?

<p>0.09047</p> Signup and view all the answers

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?

<p>3.10</p> Signup and view all the answers

A 24.5 g sample of solution has a density of 0.768 g/mL. What is the sample volume (in mL)?

<p>31.901</p> Signup and view all the answers

A block has a mass of 4.465 g and a volume of 143.2 cm3. Calculate the density in g/cm3.

<p>0.0311</p> Signup and view all the answers

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?

<p>12.506</p> Signup and view all the answers

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?

<p>32.9 ± 0.3 mL</p> Signup and view all the answers

What is the last step of any spill cleanup procedure?

<p>Wipe down the affected area with detergent and water.</p> Signup and view all the answers

Which steps are necessary for cleaning a spill involving broken glass? (Select one or more)

<p>Pick up large pieces of glass with gloved hands.</p> Signup and view all the answers

Syringe tips __________

<p>sharps container</p> Signup and view all the answers

Unused solid reagent __________

<p>solid waste container</p> Signup and view all the answers

Titrant solution __________

<p>nalgene bottle with cap</p> Signup and view all the answers

Broken flask ____________

<p>box lined with puncture resistant bag</p> Signup and view all the answers

When should you start a new chemical waste container in the lab?

<p>When the contents of the current container are a couple inches below the brim of the container</p> Signup and view all the answers

Which chemical waste situation should always be supervised or performed by an instructor?

<p>Cleaning up a broken mercury thermometer</p> Signup and view all the answers

What are the best practices for safely handling waste in the lab? (Select one or more)

<p>Always wear appropriate Personal Protective Equipment.</p> Signup and view all the answers

What should you do after finishing work with a reagent bottle? (Select one or more)

<p>Close the bottle</p> Signup and view all the answers

In general, which characteristics are necessary for a location to be suitable for chemical storage? (Select one or more)

<p>Dry</p> Signup and view all the answers

Identify the types of information that are necessary to communicate with emergency responders. (Select one or more)

<p>How the incident happened</p> Signup and view all the answers

What is the first step for response to an emergency situation?

<p>Remain calm and quiet, gather information, and assess the situation.</p> Signup and view all the answers

What does each color of the NFPA diamond represent? Yellow __________, Blue __________, White __________, Red __________.

<p>reactivity, health, special hazards, fire</p> Signup and view all the answers

The green sign with an eye represents what?

<p>eyewash station</p> Signup and view all the answers

What does the sign with a red border and a black cylinder icon represent?

<p>gas cylinder</p> Signup and view all the answers

What is the diamond sign?

<p>NFPA diamond</p> Signup and view all the answers

What is the main precaution to take if a Gas Cylinder sign is present in the lab?

<p>Visually check that the gas cylinder is restrained but keep a safe distance from it.</p> Signup and view all the answers

When should lab participants look at the Safety Data Sheet (SDS) of a substance?

<p>Before using the substance</p> Signup and view all the answers

Read the Safety Data Sheet (click SDS icon below) of hydrogen peroxide to identify the recommended way to store this substance.

<p>In a tightly closed container in a dry and well-ventilated place</p> Signup and view all the answers

How to turn on the shower if chemicals spill on you or clothing?

<p>pull, 15 min</p> Signup and view all the answers

In case of accidental contact with chemicals, how long should the eyes be flushed at the eyewash station?

<p>15 minutes</p> Signup and view all the answers

Under what conditions should a student inform the instructor of a lab injury?

<p>The instructor must be informed of all laboratory injuries.</p> Signup and view all the answers

How to change gloves?

<p>Changing gloves often will minimize the spread of chemicals. To properly remove gloves, first, grasp the exterior of one glove with a gloved hand, insert a gloved finger into one glove, grasp the exterior of one glove with a bare hand, and then peel off the first glove, rip off the first glove, wash off the first glove. Then insert a bare finger into the second glove and remove it.</p> Signup and view all the answers

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?

<p>Lab coat</p> Signup and view all the answers

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?

<p>Closed-toe shoes</p> Signup and view all the answers

Which PPE matches best with the incident: While picking up a buret, an unknown solution left by a previous solution drips onto your hand?

<p>Gloves</p> Signup and view all the answers

Which PPE matches best with the incident: While checking on a stirring solution, the solution splashes up towards your face?

<p>Goggles</p> Signup and view all the answers

Determine when to put on disposable gloves for work in the lab.

<p>Before handling any glassware or chemicals for the experiment</p> Signup and view all the answers

Determine when you should remove your goggles in the lab room.

<p>When everyone in the room is done handling any chemicals or glassware</p> Signup and view all the answers

Steps to clean up a liquid spill:

<ol> <li>Surround the area with absorbent material then cover the spill. 2. Scoop up the material and place in a plastic bag. 3. Place the bagged waste in a solid waste container. 4. Wipe down the area with detergent and water.</li> </ol> Signup and view all the answers

What information does not need to be included on a chemical waste label?

<p>A description of the experiment the chemicals were used for</p> Signup and view all the answers

Which is NOT a good source of information about the hazards that affect waste disposal in a chemistry lab?

<p>Your lab partner</p> Signup and view all the answers

What are the best practices for safely handling waste in the lab? (Select one or more)

<p>Check labels or instructions before any disposal.</p> Signup and view all the answers

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?

<p>Check and see if anyone else can use the chemical. If not, discard in the proper waste container.</p> Signup and view all the answers

What information is needed in order to be prepared for an emergency? (Select one or more)

<p>Contact information for emergency personnel</p> Signup and view all the answers

What is the main precaution to take if a Gas Cylinder sign is present in the lab?

<p>Visually check that the gas cylinder is restrained but keep a safe distance from it.</p> Signup and view all the answers

Which types of signs are posted to convey information about chemical storage? (Select one or more)

<p>National Fire Protection Association (NFPA) diamond</p> Signup and view all the answers

Which signs are typically posted in areas of active lab work? (Select one or more)

<p>Sign prohibiting food and drink</p> Signup and view all the answers

What should you do every time you are about to heat glassware on a hot plate? (Select one or more)

<p>Inspect the hot plate for frayed cords</p> Signup and view all the answers

Steps to boil solution on a hot plate.

<p>Start by starting and stabilizing the stir function, then turn heat to medium heat, then if necessary, turn up heat setting.</p> Signup and view all the answers

While setting up a beaker on a hot plate and the stirring becomes erratic, what do you do?

<p>Turn down stirring speed and move the beaker to the center of the hot plate.</p> Signup and view all the answers

Which procedure cannot be performed on a hot plate, requiring a Bunsen burner instead?

<p>Heating a crucible to remove water from a hydrate.</p> Signup and view all the answers

When using a properly stabilized balance, how should you ensure that you get the most accurate mass reading possible?

<p>Close the side shields on the balance during reading. Measure the mass of the sample at room temperature.</p> Signup and view all the answers

Identify which balance was used to make each mass reading.

<ol> <li>230 g = ±0.01</li> <li>0.90 g = ±0.01</li> <li>5.43 g = ±0.01</li> <li>6.539 g = ±0.001</li> <li>4.0000 g = ±0.0001</li> </ol> Signup and view all the answers

What action is NOT necessary before lighting a Bunsen burner?

<p>Leave the gas cock open for a few minutes before lighting to clear the line.</p> Signup and view all the answers

Blue flame, you should __________ the __________ further.

<p>open, air inlet</p> Signup and view all the answers

To increase the size of the flame, you should __________ the __________ further.

<p>open, gas regulator</p> Signup and view all the answers

Relative order of the metric prefixes of kilo-, micro-, centi-, and milli.

<p>(smallest) micro, milli, centi, kilo(largest)</p> Signup and view all the answers

Addition and subtraction significant figures.

<p>When performing an addition or subtraction calculation, significant figures in the result are dictated by the decimal places of the measured numbers. The result should have the same number of significant figures past the decimal point as the measured number with the fewest digits past the decimal point.</p> Signup and view all the answers

What is the purpose of stirring a solution while it is being heated?

<p>To help evenly distribute heat throughout the solution.</p> Signup and view all the answers

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.

<p>is less than</p> Signup and view all the answers

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.

<p>bulb or pump, meniscus, outside</p> Signup and view all the answers

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.

<p>physical, physical</p> Signup and view all the answers

Each of the substances in the mixture retains its __________ identity. Mixtures are separable into these components by __________ means.

<p>chemical, physical</p> Signup and view all the answers

Most of the __________ people encounter in everyday life consists of __________ of different substances.

<p>matter, mixtures</p> Signup and view all the answers

Whereas __________ substances have __________ the compositions, the composition of __________ can vary.

<p>pure, fixed, mixtures</p> Signup and view all the answers

Sublimation is a phase change from __________ to __________. The __________ phase is not present in this change.

<p>solid, gas, liquid</p> Signup and view all the answers

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?

<p>Extraction</p> Signup and view all the answers

What type of separation technique needs to be used when a liquid is carefully poured out, leaving the solid behind in the container?

<p>Decantation</p> Signup and view all the answers

What type of separation technique needs to be used when a solid is caught on paper or a membrane while the liquid passes through?

<p>Filtration</p> Signup and view all the answers

What type of separation technique needs to be used when a solid mixture is heated and one component transitions directly between solid and gas?

<p>Sublimation</p> Signup and view all the answers

What are the substances making up a mixture called?

<p>Components</p> Signup and view all the answers

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.

<p>Decantation</p> Signup and view all the answers

How can a solid dissolved in water be separated from the water?

<p>Evaporation</p> Signup and view all the answers

Which process is used to separate soluble compounds from insoluble compounds?

<p>Extraction</p> Signup and view all the answers

This is the process of separating a solid from a liquid by means of a porous material.

<p>Filtration</p> Signup and view all the answers

The composition of heterogeneous mixtures is __________.

<p>Variable</p> Signup and view all the answers

The composition of homogeneous mixtures is __________.

<p>Uniform</p> Signup and view all the answers

What are minor components in a mixture called?

<p>Impurities</p> Signup and view all the answers

Sublimation is a phase change from solid to a gas without going through a liquid phase.

Signup and view all the answers

A solvent is added to dissolve only one mixture component and then the liquids are separated.

<p>Extraction</p> Signup and view all the answers

A liquid is carefully poured out, leaving the solid behind in the container.

<p>Decantation</p> Signup and view all the answers

A solid is caught on paper or a membrane while the liquid passes through.

<p>Filtration</p> Signup and view all the answers

A solid mixture is heated. One component transitions directly between solid and gas.

<p>Sublimation</p> Signup and view all the answers

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.

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