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Chem Lab Final Exam

Total questions: 50

Worksheet time: 2hrs 30mins

Name
Class
Date
1.

It is used to heat samples in the lab. Some applications include maintaining cell lines or heating flammable chemicals that might combust if exposed to open flame.

a)

Iron stand

b)

funnel

c)

water trough

d)

water bath

2.

It is the ideal stopper used in test tubes and flasks.

a)

water bath

b)

clay triangle

c)

cork

d)

screw

3.

It is also used in some instances to clamp a couple of support rods together, or to clamp an iron ring or other attachment to a metal bar.

a)

iron stand

b)

meter stick

c)

wire gauze

d)

burette

4.

Used to hold crucibles

a)

crucible holder

b)

test tube holder

c)

crucible tong

d)

pipettes

5.

Used to heat liquids for evaporation.

a)

mortar and pestle

b)

glass watch

c)

evaporating dish

d)

funnel

6.

It is used for containing water when collecting gases

a)

test tube holder

b)

water through

c)

Erlenmeyer flask

d)

beakers

7.

It is used to measure masses very precisely

a)

weighing scale

b)

burette

c)

dropper

d)

beam balance

8.

It is used to support a container, such as a beaker, on a ring stand while it is being heated. May have a fiberglass or ceramic center.

a)

wire gauze

b)

stirring rod

c)

beam balance

d)

ring stand

9.

It is used to measure length in the Metric System.

a)

meter stick

b)

compass

c)

protractor

d)

graduated cylinder

10.

Are containers made of glass, plastic, borosilicate or related substances, and topped by special caps or stoppers and are intended to contain chemicals in liquid or powder form for laboratories and stored in cabinets or on shelves.

a)

bottle reagents

b)

test tube racks

c)

volumetric flask

d)

florence flask

11.

It is used to measure the temperature of an object or a substance.

a)

barometer

b)

thermometer

c)

hygrometer

d)

milliliter

12.

Which laboratory apparatus would you use to measure 75ml of water accurately?

a)
b)
c)
d)
13.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1, 
d)
4, 3, 1, 2
14.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
15.
Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density?
a)
3 g/cm3
b)
1/3 g/cm3
c)
27 g/cm3
d)
39 g/cm3
16.
Jack has a rock. The rock has a mass of 14g and a volume of 2cm3. What is the density of the rock?
a)
7 mL
b)
7 g/cm3
c)
28 g/cm3
d)
1/7 g/cm3
17.
In the picture, the mass of the block is 200 g, the dimensions of the block are 6 cm by 4 cm by 5 cm.  What is its density?
a)
1.67g/cm3
b)
13.33 g/cm3
c)
0.60 g/cm3
d)
 24000 g/cm3
18.
An irregularly shaped piece of gold was lowered into a graduated cylinder holding a volume of water equal to 17 ml. The height of the water rose to 20 ml. If the mass of the gold was 27 g, what was its density?
a)
9 g/mL
b)
10.5 g/mL
c)
6.5 g/mL
d)
8 g/mL
19.
An irregularly shaped rock was lowered into a graduated cylinder holding a volume of water equal to 50 ml. The height of the water rose to 75 ml. If the mass of the stone was 250 g, what was its density?
a)
15 g/mL
b)
5 g/mL
c)
10 g/mL
d)
20 g/mL
20.
CH4  +  2O2  →  CO2  +  2H2O
24 grams of CH4 was added to the above reaction. Calculate the theoretical yield of CO2.
a)
66 grams
b)
132 grams
c)
33 grams
d)
8.72
21.
2Fe2O3  +  C  →  Fe  +  3CO2
You add 28 grams of carbon. You find the actual yield to be 181.2 grams of CO2. What is the percent yield of CO2? (Hint: calculate theoretical yield of CO2 first)
a)
15.8%
b)
209.2%
c)
6435%
d)
15.5
22.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
23.
Zn  +  CuCl​2​​  →  ZnCl​2​  ​+  Cu
How many grams of ZnCl2 will be produced from 23.0 g of Zn
a)
0.354 moles
b)
1495 moles
c)
47.76 g
24.

Which laboratory apparatus would you use to measure 75ml of water accurately?

a)
b)
c)
d)
25.

Which laboratory apparatus is a measuring cylinder?

a)
b)
c)
d)
26.

Which laboratory apparatus is a beaker?

a)
b)
c)
d)
27.

The laboratory apparatus above are used to measure _____________ .

a)

mass

b)

length

c)

volume

d)

temperature

28.

Which of the following apparatus would you use to measure 240 g accurately?

a)
b)
29.

The apparatus above are used to measure _________ .

a)

mass

b)

length

c)

volume

d)

temperature

30.

Apparatus used for heating small quantity of chemicals

a)

Beaker

b)

Flask

c)

Test tube

d)

Gas jar

31.

Mention the use and the material from which it is made of.

a)

Plastic and for crushing solids

b)

Steel and for mixing chemicals

c)

Porcelain and for crushing and grinding solids

32.

It is also used in some instances to clamp a couple of support rods together, or to clamp an iron ring or other attachment to a metal bar.

a)

iron stand

b)

meter stick

c)

wire gauze

d)

burette

33.

Used to heat liquids for evaporation.

a)

mortar and pestle

b)

glass watch

c)

evaporating dish

d)

funnel

34.

What laboratory apparatus are you going to use if you want to pour liquids into containers with small openings?

a)

test tube

b)

evaporating dish

c)

glass funnel

35.

Name this apparatus

a)

Spirit lamp

b)

Burner

c)

Bunsen burner

d)

Automatic flame

36.

From what material is this apparatus made up of?

a)

Meshed iron wire and asbestos

b)

Wire

c)

Steel wire and sand

d)

Iron wire and porcelain

37.

Mention the use of this apparatus

a)

For keeping the test tube

b)

For supporting the apparatus during heating

c)

For drying other apparatus

d)

Used as a shelf

38.

An apparatus used for preparing and keeping the solution for experiment.

a)

Flask

b)

Test tube

c)

Gas jar

d)

Beaker

39.
What is the name of this piece of science equipment?
a)
Plastic spout
b)
Funnel
c)
Y-Spout
d)
Water spout
40.

Which of these pieces of equipment is beaker?

a)
b)
c)
d)
41.

Identify the laboratory apparatus given.

a)

Beaker

b)

Burette

c)

Pipette

d)

Florence flask

42.

Mention the material from which this apparatus is made and its use.

a)

Plastic and for crushing solids

b)

Steel and for mixing chemicals

c)

Porcelain and for crushing and grinding solids

d)

Glass and for mixing chemicals

43.

Identify the laboratory apparatus given.

a)

Erlenmeyer flask

b)

Graduated cylinder

c)

Triple Beam Balance

d)

Volumetric flask

44.
Zed went to the store and bought a bag of chips.  He estimated there would be 350 chips in the package, but realized there were only 210 chips in that package.  What was his percent error?
a)
35%
b)
67%
c)
85%
d)
92%
45.
The attendance for the basketball game was estimated to be 15,000 people but 12,500 people attended. What was the percent error?
a)
16.67%
b)
20%
c)
2500%
d)
80%
46.
Ms. Brown estimated 70 students would try out for the Cross Country team. This year, only 63 students tried out. What was her percent error?
a)
11%
b)
50%
c)
12%
d)
1%
47.

pH is the measure of...

a)

the acidity of a solution

b)

amount of salt in the water

c)

amount of dirt of water

48.

A pH between 0-6 is considered...

a)

basic

b)

acidic

49.

Salinity is...

a)

the amount of salt in the water

b)

the amount of dirt in the water

50.

Which of the following is an example of a physical change?

a)

mixing baking soda and vinegar causing bubbles to form

b)

dissolving sugar into sweet tea

c)

heating sugar until it turns black

d)

letting milk spoil, forming a solid from a liquid

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