Chemistry 1151
What is the first step for response to an emergency situation?
Remain calm and quiet, gather information, and assess the situation.
What should you do every time before you leave the lab?
Remove your labcoat. Remove your gloves. Wash your hands.
Which is NOT a good source of information about the hazards that affect waste disposal in a chemistry lab?
Your lab partner
Fill in the words to complete each step in liquid spill cleanup. 1. Surround the area with_______, then cover the spill. 2. Scoop up the material and place in a_______. 3. Place the bagged waste in a _______ 4. Wipe down the area with______
absorbent material plastic bag solid waste container detergent and water
If you drop or break glassware in lab, first___________. Then, _______. Finally, place all that material into the _______.
get thick gloves or dustpan carefully collect all the broken glassware broken glass container
How many kilometers is 2490.2 cm?
.024902
A block has a mass of 4.710 g and a volume of 132.1 cm3. Calculate the density in g/cm3.
.03565
How many liters is 41.9 mL?
.0419
How many liters is 81.3 mL?
.0813
A football field is 120 yards by 53.333 yards. What is the area of the football field in acres if 1 acre=43560 ft2? Use correct significant figures when answering this question.
1.3
A 2.67 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?
12.5
Calculate the volume of a box which is 125 cm long, 37 cm wide, and 68 cm high. Report your answer with correct significant figures in cubic centimeters.
125x37x68 310000
Knowing that one day is 24 hours, how many days is 97.7 hours?
4.07
Knowing that one day is 24 hours and one hour is 60 minutes, how many minutes are in 4.6 days?
1400
Ruler showing a bit past 15.5
15.60
Convert 7860 feet to miles 7860 feet×( A )/( B )
1mile/5280 feet 7860 feet=1.49 miles
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?
2.7
A 24.5 g sample of solution has a density of 0.768 g/mL. What is the sample volume (in mL)?
31.9
What is the mass of the solid sample? Mass of weigh boat: 1.679g Mass of weigh boat and sample: 6.477g
6.477-1.679= 4.798
Identify correctly formatted scientific notation.
8×106 4.532×10−9 6.1×1012
Choose the best graduated cylinder to make each measurement in a single use. 36 mL of water 5.75 mL of a sucrose solution 18.5 mL of a NaClsolution
A 50 mL graduated cylinder with markings every 10 mL A 10 mL graduated cylinder with markings every 0.1 mL A 25 mL graduated cylinder with markings every 1 mL
What information does not need to be included a chemical waste label?
A description of the experiment the chemicals were used for
What is the abbreviation for the element? Silver Fluorine Iron Phosphorus Sodium
Ag F Fe P Na
What are the best practices while sharing a lab balance with other students?
Alert your TA or instructor about any issues with the balance. Brush off any chemical dust around the balance after each use.
Identify the types of information that are necessary to communicate with emergency responders.
Any chemicals involved in an incident Any other hazards present in the lab How the incident happened
When is the best time to clean glassware during the lab session? Select one:
As soon as practical after use
Determine when to put on disposable gloves for work in the lab.
Before handling any glassware or chemicals for the experiment
Identify tools that are ideal for cleaning glassware. Select one or more: Brushes Steel wool Reusable cloths Detergent and water
Brushes Detergent and Water
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?
Check and see if anyone else can use the chemical. If not, discard in the proper waste container.
What are the best practices for safely handling waste in the lab?
Check labels or instructions before any disposal. Always wear appropriate Personal Protective Equipment.
Which signs are typically posted in areas of active lab work?
Chemical storage signs Sign prohibiting food and drink Safety equipment signs Personal protective equipment (PPE) sign
Identify the precautions to take with exits in the lab.
Do not block a door with an EXIT sign. Locate the exits prior to the start of lab.
What should you do every time you are about to heat glassware on a hot plate? Select one or more:
Ensure that the glassware is designed for heating Inspect the hot plate for frayed cords Check that there are no cracks in the glassware
Identify the section in which each type of information can be found on a Safety Data Sheet. recommendations in case of accidental contact with the chemical incompatibility or reactivity with other chemicals recommended personal protective equipment (PPE) chemical name and formula possible dangers and health effects
First Aid Measures Handling and Storage Exposure Controls/Personal Protection Identification Hazards Identification
Match each lab incident to the item of PPE that will protect you from it. Each item of PPE will only be used once. While checking on a stirring solution, the solution splashes up towards your face. While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor. While picking up a buret, an unknown solution left by a previous solution drips onto your hand. While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench.
Goggles Closed-toe shoes Gloves Lab coat
Which types of signs are posted to convey information about chemical storage?
Hazard signs such as "Flammable," "Oxidizer," and "Corrosive" National Fire Protection Association (NFPA) diamond Gas Cylinder sign
Check that there are no cracks in the glassware
Heating a crucible to remove water from a hydrate
Where should glassware be stored after it is cleaned?
In a drying oven, or designated locations such as drawers or buret racks
Read the Safety Data Sheet (click SDS icon below) of hydrogen peroxide to identify the recommended way to store this substance.
In a tightly closed container in a dry and well-ventilated place
How should students prepare to use chemicals in the lab?
Locate the spill kits and understand how they are used. Become familiar with the chemicals to be used, including exposure or spill hazards.
What practice will not help you make an accurate volume reading on a buret at the beginning of a titration?
Make sure that the meniscus starts exactly at 0.00 mL.
After clamping a buret to a ring stand, you notice that the set-up is tippy and unstable. What should you do to stabilize the set-up?
Move the buret clamp to a ring stand with a larger base.
Determine where to dispose of each type of waste: titrant solution syringe tips unused solid reagent broken flask
Nalgene bottle with cap Sharps container' Solid waste container Box lined with puncture resistant bag
What is generally the best approach when liquid from a large reagent bottle is needed in an experiment?
Pour some of the reagent from the bottle into a beaker, then use as needed in the procedure.
Under what conditions should a student inform the instructor of a lab injury?
The instructor must be informed of all laboratory injuries.
Determine the best way to deal with each of the following items that may dangle into the way during lab work. flowy sleeves loose bracelets long earrings long hair necklaces
Tie back or secure Remove Remove Tie back or secure Remove
Read the Safety Data Sheet (SDS) (click the SDS icon below) of hydrogen peroxide to identify the type of eye protection recommended when handling this substance.
Tightly fitting safety goggles
While setting up a beaker to boil a solution on a hot plate, you notice that the stirring is erratic and unstable. What should you do to stabilize the stirring solution? Select one or more:
Turn down the stirring speed. Clamp the beaker in place at the edge of the hot plate.
Determine the safest option in the lab if you need your vision to be corrected.
Wear corrective glasses or lenses under your safety goggles for the whole experiment, but always check with your TA or Instructor for your school's policy
Determine when you should remove your goggles in the lab room.
When everyone in the room is done handling any chemicals or glassware
When should you start a new chemical waste container in the lab?
When the contents of the current container are a couple inches below the brim of the container
What is the last step of any spill cleanup procedure?
Wipe down the affected area with detergent and water.
When an alarm sounds in the laboratory, it is important to respond_____ and remain____-. Listen for any other instruction, turn off any_____ in use, and be prepared to leave immediately.
calmly quiet equipment
How the incident happened a fire with a line under it A fire with an O on it wings and hairy hands connected by two pin ball things
flammable oxidizing corrosive
Changing gloves often will minimize the spread of chemicals. To properly remove gloves, first,__________, and then,_______. Then insert_______ between the interior edge of the second glove and the skin, and remove the second glove.
grasp the exterior of one glove with a gloved hand peel off the first glove a bare finger
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
is less than
When using the Tare function on a balance, start by_______. Then,_________ to cancel out that mass. Finally,______ and record the mass of your sample
placing the glassware on the balance. press the Tare/Zero button add your sample to the glassware
Identify the safety equipment designed to deal with each emergency listed. chemicals on clothes fire on a person chemicals in eyes large fire on the benchtop cuts or minor burns
safety shower fire blanket eyewash station fire extinguisher first aid kit
Move to the safety shower if you spill hazardous chemicals on your______. Stand under the shower and _____ the lever. Remove clothing and continue flushing the area for ______.
skin/clothing pull 15 mins
Read each statement regarding food and beverages in the lab and determine if each is true or false. Tobacco products of all kinds are prohibited in lab. Chewing gum is okay in the lab as long as you don't blow bubbles. Beverages are allowed in lab as long as they are in containers with lids. Food items should not be brought into the lab.
t f f t
Name some solutions in every day life
tea, mouthwash, rubbing alcohol, vinegar
When reading a graduated cylinder what do you round to
tehths
Using the letters on the image, identify each component of the liquid waste set-up. In a picture with a tub holdong two bottles (one being organic waste and the other being aqueous waste). which are primary and secondary containers?
the aqueous is a primary container the organic waste is the big tub is a secondary container
To measure out a volume of liquid, start by choosing the appropriate graduated cylinder and moving the bumper to the_____ of the graduated cylinder to protect it from breakage. Then, pour the liquid into the graduated cylinder until the____of the meniscus aligns with the desired volume marking when you look at the graduated cylinder from
top bottom eyelevel
Determine whether each of the properties described applies to volumetric or graduated glassware. used for applications in which great accuracy is needed designed to measure one specific volume of liquid capable of measuring a range of volumes of liquid
volumetric volumetric graduated
