Heidi Gooding Chemistry Safety Rules

Front 1

What is the result when the holes of the burner are completely closed?

Back 1

The flame turned from blue to yellow.

Front 2

Describe what happened when an evaporating dish is held in the flame. Suggest a possible explanation.

Back 2

When burning with a luminous flame (low) it doesnt burn completely and it forms sut.

Front 3

Where is the hottest portion of a properly adjusted flame located?

Back 3

At the tip of the inner cone.

Front 4

What happens when copper wire is held in the hottest part of the flame?

Back 4

It then begins to catch on fire/ spark.

Front 5

Why is the nonluminous flame preferred over the yellow luminous flame in the laboratory?

Back 5

Because it is even hotter.

Front 6

Describe the scale of your graduated cylinder (that is what is the smallest division and what is the maximum capacity).

Back 6

The maximum capacity of the graduated cylinder is 100 mL and the smallest is 1mL.

Front 7

A filter should not be wet with water when the liquid to be filtered does not mix with water. Why?

Back 7

When you have something that doesnt mix with water for ex. oil it wouldnot go through because water is on the filter paper. So dont put water on the filter paper so it can pass thru.

Front 8

What property of the sand enables it to be seprarated from the water by filtration?

Back 8

Because the sand is a solid that doesnt mix with water.

Front 9

What does the filtrated contains? After the water and salt includiing the sand was poured in...

Back 9

sodium chloride and water (h20)

Front 10

What property of the salt prevents it from being separated from the water by filtration?

Back 10

Because the salt dissolves into the water.

Front 11

Why should a low flame be used to heat the filtrate if the solid is to be recovered?

Back 11

So that you dont over heat it that it would splatter or burn the solid so you heat it slowly and evaporate the solvet with out splattering.

Front 12

As soon as you enter the lab, what safety equipment should you put on immediately?

Back 12

Apron and googles.

Front 13

Before doing an experiment, what should you read and discuss with your teacher?

Back 13

read the safety paragragh and review the safety rules and regulation needed to conduct the experiment safely before you begin.

Front 14

Before you light the burner, what safety precuations should always be followed?

Back 14

Should always check to see that long hair and loose clothing have been confined/put away. Also wear safety googles.

Front 15

What immediate action should you take when the flame of your burner is burning inside the base of the barrel?

Back 15

You should turn off the gas at the gas valve. Do not touch the barrel for it is extremely hot. Allow barrel to cool down.

Front 16

When inserting glass tubing, why is it important that you wear safety googles and gloves or cover the tubing and stopper with protective pads and cloth?

Back 16

Because the glass could brake.

Front 17

What do you think might be a common cause of fires in lab drawers or locker?

Back 17

Because if you put hot items in a wooden drawer it would eventually heat up and catch on fire.

Front 18

Why are broken glassware, chemical, matches, and other laboratory debris never discarded in a waste paper basket?

Back 18

Because it is a safety precaution against fires and it prevents personal injuries such as hand cuts.

Front 19

List the safety precautions that should be observed when inserting or removing glass tubing from a rubber stopper?

Back 19

Never attempt to insert glasstubing that has jagged edge they should b polished b4 being inserted into a rubber stopper. Use water or glycerin as lubricant at the end; next protect hands and fingers by wearing leather gloves. Use a twisting motion and gently push the glasstubing into the stopper then when finished remove the glasstubing to keep it from sticking or freezing to glass.

Front 20

Why should you never touch chemicals with your hands?

Back 20

B/c it could pass thru the skin into the blood stream and can cause serious health problems.

Front 21

What precaution can help prevent chemical contamination in reagent bottles?

Back 21

Never pour unused chemicals back into their reagent bottles.

Front 22

Why are chemicals and hot objects never placs directly on a balance pan?

Back 22

Bc it can permanently damage the surface of the balance pan and affect the accuracy of measurements.

Front 23

List 3 pieces of equip. used in the lab for measuring small quanities of liquids. What is the correct procedure for filling a buret wit liquid?

Back 23

Pipet, graduated cylinder, and a buret; Never pour a liquid directly from its reagent bottle into the buret. You should 1st pour the liquid into a small clean and dry beaker that is easy to handle then pour the liquid from the beaker into the buret. (PREVENT SPILLAGE)

Front 24

How can a liquid be transferred from a beaker to a funnel w/o spattering and w/o runnin dwn the outside wall of the beaker?

Back 24

By holding a stirring rod at the lip of the beaker. The liquid will run dwn the rod and drop off into te funnel w.o runnin dwn the outside of the beaker.

Front 25

Describe the conditions of all lab equip. at the end of an experiment. What should be checked before you leave the lab?

Back 25

equip. should b clean and dry and put away in an orderly fashion for the next lab experimen. Be sure that the valve of the gas jet is shut off. Make sure to wash hands thouroughly w/ soap at the end of each lab period.

Front 26

What is the correct procedure for removing a solid reagent from its container in preparation for use in an experiment?

Back 26

By using a spatula.

Front 27

What is the the correct procedure from removing a liquid reagent from its container in preparation for use in an experiment?

Back 27

From a beaker hold a stirring rod at the lip and pour slowly so that the water wont spill on the side.

Front 28

Wht is it important to use a low flame when evaporating water from a recovered filtrate?

Back 28

Bc a high flame would cause water to over react and splatter to the side w/o evaporating it/burning it

Front 29

Never work alone in the lab.
true or false

Back 29

true

Front 30

Never lay the stopper of a reagent bottle on the lab table.
true or false

Back 30

true

Front 31

At the end of an experiment in order to save the school'smoney save all excess chemicals and pour them into their stock bottles.
true or false

Back 31

false

Front 32

The quickest and safest way to heat a material in a test tube is by concentrating the flame of the test tube.
true or false

Back 32

false

Front 33

Use care in selecting glassware for high temperature heating. Glassware should by Pyrex or a similar heat treated type.
true or false

Back 33

true

Front 34

A mortar and pestle should be used for grinding only one substance at a time.
true or false

Back 34

TRUE

Front 35

Safety googles protect your eyes from particles and chemical injuries. Ot is completely safe to wear contact lenses under them while performing experiments.
true or false

Back 35

false

Front 36

Never use the watepaper basket for disposal of chemicals.
true or false

Back 36

true

Front 37

First aid kits may be used by anyone to give emergency treatment after an injury accident,
true or false

Back 37

false

Front 38

Eye wash and face wash fountains and safety shower should be checked daily for proper operation.
true or false

Back 38

false

Front 39

nonluminous

Back 39

blue flame

Front 40

luminous

Back 40

yellow flame

Front 41

meniscus

Back 41

a dip in water lik a u

Front 42

filtration

Back 42

process of seperationg liquid

Front 43

filtrate

Back 43

is what goes throught the funnel into the beaker after filtration