Week 5 Lab Worksheet 1
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Chemistry
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May 31, 2024
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1
ACTIVITY
Lab Worksheet
Hypotheses
Activity 1.
Tubes 1 and 2:
Neither of the tubes will change colors.
Tubes 5 and 6:
The color will change and the separation of the oil and water will be visible.
Tubes 3 and 4:
I will be able to see the oil breakdown and the water separate.
Observations/Data Tables
Data Table 1. Tubes 1 and 2 Observations
Day
Tube 1
Tube 2
0
(Initial setup)
None of the solution or oil has split but it is foamy on top.
This tube has much more foam on top than tube 1.
1
I am starting to see the oil rise to the top.
The color is changing to a light orange/brown and it is a little foamy/
2
Small amount of oil sits on top. The color is like a watery orange.
Thicker solution than tube 1. A big ring of foam sits on top.
2
Carolina Distance Learning
3
No change from day 2. Has thickened since day 2. continued on next page
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3
Data Table 2. Tubes 3 and 4 Observations
Day
Tube 3
Tube 4
0
(Initial setup)
Looks like plain water.
The presence of a few bubbles.
1
Turned a dark grayish color. Really bubbly. 2
The gray color is gone. The oil has started to rise to the top.
A tube full of foam.
3
Water and the oil has separated. The oil has thickened on top and bubbles sit under it.
Data Table 3. Tubes 5 and 6 Observations
Chosen environmental factor to alter/change: Light Conditions
Day
Tube 5
Tube 6
0
(Initial setup)
The oil and solution has created a light pinkish
color. This tube has the least amount of liquid in it than the other tubes.
Turned a brownish color.
1
Starting to see oil and bubbles form. A lot thicker than tube 5 and the oil has separated to the top of the tube.
2
Really orange and cloudy.
Foam on top, thick oil, then water.
3
Has thickened up a lot. A lot of bubbles are throughout the tube and oil mix.
Can see all three parts, the water, the oil and the solution. continued on next page
Your preview ends here
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Related Questions
Activity 3
Direction: Match the following processes with their descriptions.
1. Storage
a. Some chemicals are added to the
water that will make the dirt and some
2. Sedimentation
dissolved particles to stick together
3. Filtration
b. Water is placed here before it is
transported to your house
4. Disinfection
5. Coagulation
c. Flocs start to get really heavy and sink
6. Aeration
to the bottom of the tank where they
can be removed
d. Water flows slowly through this
section made up of layers of sand,
gravel, and charcoal
e. Water and air in close contact in order
to remove dissolved gases and metals
f. Chlorine is added
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Concentration (mg/ml)
Time (min)
8.5
0.5
6.8
5.4
1.5
4.0
2
3.2
2.5
2.5
3
What will be the slope of the line using the given first and second values?
What will be the y-intercept, still using the given first and second values?
Completely state the equation of the line.
nlcot olN5
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please i really need your help with this
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6. When humans plant more trees, carbon can begin entering the _______________ as carbon dioxide.
A-hydrosphere
B-atmosphere
C-geosphere
D-biosphere
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Posttest
Direction. Read the questions carefully. Write the letter of the correct answer.
1. Water exists in three states of matter and continuously moving through a cycle
on Earth. At which stage in the water cycle does water transform from a gas to a
liquid?
a.evaporation
c. precipitation
b. condensation
d. Sublimation
2.
Carbon dioxide (CO2) forms when coal burns in the presence of oxygen. Which
of the following is the BEST evidence that a chemical reaction occurs when the coal
burns?
a. Production of mechanical energy c. A new substance is produced
b. Production of electricity
d. Formation of precipitate
3.Which of these does NOT happen during a chemical change?
a. New substances are formed with different chemical properties.
b. Attractive force between atoms of molecule formed or break.
c. The chemical properties of the substances before and after the reaction are
the same
d. Energy is always released or absorbed.
4. A granular substance is added to a liquid. Which of the…
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Find the Final volume of buret (mL) and the Concentration of NaOH (M )
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7-10 subparts
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Home
Tools
Lab Experiment #... x
...
+)
玩,
1
| 2
97.4%
Record
your
observations following each reaction including changes in color and state of matter.
AGNO3 (Ag*)
Pb(NO3)2 (Pb²*)
Ca(NO3)2 (Ca²+)
а
e
i
NazCO3
Light orange solid
white, cloudy solid
white, cloudy, solid
(СО2)
b
NaOH
f
dark brown solid
stay clear, liquid
white, cloudy solid
(OH)
g
k
NazSO4
stay clear, liquid
white, cloudy, solid
white, cloudy, solid
(SO?)
d
NaCl
1
white, cloudy solid
white, cloudy solid
stay clear, liquid
(CF)
....
Remember to complete and submit this table to your instructor before the end of the class session.
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I need help constructing graph I m not sure where to put values
On the graph paper plot a graph of your reaction rates vs. concentration by using
vertical scale or Y-axis representing reaction rate and a horizontal scale or X-axis
representing mls of solution #1(KIO3).
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Concentration (mol L-¹)
COCI₂(g) Cl₂(g) + CO(g) AH=+108 kJ
0.14-
0.12-
0.10-
0.08-
0.06
0.04
0.02-
0.00-
0
2
4
-Cl₂
6
CO
COCI₂
8 10 12 14
Time (min)
a. The stress that occurred at 4 seconds was an:
a. increase in temperature
b. decrease in temperature
c. increase in volume
d. decrease in volume
e. increase in the concentration of CO
f. decrease in the concentration of CO
b. The stress that occurred at 10 seconds was a(n):
a. increase in temperature
b. decrease in temperature
c. increase in volume
d. decrease in volume
e. increase in the concentration of CO
f. decrease in the concentration of CO
16
The stress that occurred at 14 seconds was a(n):
a. increase in temperature
b. decrease in temperature
c. increase in volume
d. decrease in volume
e. increase in the concentration of CO
f. decrease in the concentration of CO
18
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Match each chemical or item with the proper disposal or cleanup method. Not all disposal and cleanup methods will be labeled.
damp metal pieces Part B
Return to correctly labeled "drying out" beaker.
Answer Bank
damp metal pieces Part B
Place used items in the drawer.
calcium chloride solutions
Part A
Rinse with deionized water, dry as best you can, return to
volumetric flask Part A
the instructor.
volumetric flask Part A
metal sheets Part C
Return used material to the instructor.
damp metal pieces Part B
calcium chloride solutions Part A Pour down the sink with plenty of running water.
metal sheets Part c
volumetric flask Part A
Pour into aqueous waste container.
damp metal pieces Part B
Place used items in garbage.
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Please answer fast i give you upvote.
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STANDARD SAMPLE PREPARATIONS FOR ABSORBANCE & CONCENTRATION DATA
Concentration of stock nickel sulfate hexahydrate solution = .400 Molarity
Sample
Volume
Absorbance
Concentration (In Molarity)
a
5 mL
.179
10 mL
.329
15 mL
.588
20 mL
.760
25 mL
.939
Reference Blank = 0
Please show how to find Molarity, please show
steps. Thank you and stay safe.
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This question has multiple parts. Work all the parts to get the most points.
Use the References to access important values if needed for this question.
18
16
14
12
10
8
6
4.
Choose the correct relationship for the plot shown above.
O a direct proportion
O an inverse proportion
O linear with a positive slope and nonzero y-intercept
O linear with a negative slope and nonzero y-intercept
Submit
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Please help
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please box answers
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Pls help ASAP
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5
please help! *urgent*
write as many accurate and relevant statements about the picture below. please write more than 5 correct descriptions/statements. please be as descriptive as possible.
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Please answer questions 3 and 4 and show work please. Thank you
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3. Standard white vinegar you can buy in the grocery store is 5% concentration. That means 5% of the liquid vinegar is acetic acid and 95% of the solution is water. In a hardware store, you can buy industria
strength vinegar, which is 30% concentration. This means that 30% of the vinegar is acetic acid, and the remaining 70% is water.
Samuel does another experiment, this time with 5% vinegar and 30% vinegar. He sets up two science fair volcanoes (in no particular order), each with the same temperature, mass of baking soda and volume o
vinegar. But one volcano uses 5% vinegar and the other volcano uses 30% vinegar. He measures the volume of gas production for the'first minute of each reaction, and he records the data below.
Volcano # 1
Volume of gas produced (mL.) vs. Time (s) for Volcano #1
Time
Volume of gas
(s)
produced (ml)
60
E 50
10
20
30
25
8 40
38
46
30
20
Volume of gas
produced (ml)
40
50
50
60
52
of
10
53
20
40
60
80
Time (s)
Volcano # 2
Volume of gas
Volume of gas produced…
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2- Lab Report
1 Post-Lab
Part A
How could you distinguish solution of sodium chloride (table salt) from a solution of sodium iodide (a poison) using an AgNO3 solution? Show reactions.
Express your answers as balanced chemical equations. Identify all of the phases in your answer. Seperate the two equations by a comma.
> View Available Hint(s)
Submit
Request Answer
Part B Complete previous part(s)
Provide Feedback
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PART 4-LABORATORY SAFETY
QUESTION
1. In what situations should safety
goggles be worn?
2. Why aren't glasses approved as
protective eyewear?
ANSWER
3. Where is the first aid kit located?
4. Where is the eyewash station
located?
5. Where is the fire extinguisher
located?
6. What does ABC represent on the fire
extinguisher?
7. How is a fire extinguisher operated?
8. Which exit do you use when the fire
alarm sounds?
9. Where is the broken glass container
located?
10. Where is broken glass placed?
11. Why is there a separate container for
glass and paper?
12. Why is no food or gum or drink
allowed in the lab?
13. What should be done with long hair
during a lab?
14. Why is it dangerous to sit on the lab
benches?
15. Why must your lab work area be
kept clear of clutter?
16. Why is there no carpet in a science
laboratory?
17. Which way do the doors of a science
lab open? Why?
18. If your teacher tells you to smell a
substance during a lab, describe the
correct procedure for smelling it.
19.…
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Precipitation Tests for Proteins - Word
Decy Joy Garriel DJ
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PART II: PRECIPITATION BY INORGANIC ACIDS
TUBE NO.
TREATMENT
RESULT and OBSERVATION
1. 3 mL of
Concentrated
5% egg
HCI drop by
albumin
drop
solution
2. 3 mL of
5% egg
Concentrated
H2SO4.
albumin
solution
3. 3 mL of
4. Sulfosalicylic
Acid
5% egg
albumin
solution
Generalization:
Page 5 of 10
1245 words LE English (Philippines) & Accessibility: Investigate
100%
7:14 pm
P Type here to search
23°C Rain
4») * A ENG
W
26/12/2021
近
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16
You need to make an aqueous solution of 0.237 M cobalt(II) fluoride for an experiment in lab, using a 250 mL volumetric flask. How much solid cobalt(II)
fluoride should you add?
grams
Submit Answer
Review Topics]
[References]
Use the References to access important values if needed for this question.
Retry Entire Group
8 more group attempts remaining
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Hello tutors, need your help. Please..
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Create your own graph (s) will be x axis and y is concentration. You can use MS Excel and interpret R² and from R² what will be the concentration of nitrogen dioxide after 450 & 500 (s).
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I need help understanding how to do this, can you please show me how you get the CFU/mL
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HP TrueVision HD
4 Texas Workfor
Mộc Homework ×
W. College Physic
mical App
AN Careers
eagleonline.hccs.edu/courses/188795/assignments/3601808
valnabie diler reD 4 dl 10.1Tam
Constants | Periodic Table
Part O
Complete the fourth row.
Complete the following table by calculating the
missing entries and indicating whether the solution
is acidic or basic.
Express your answer using two decimal
places.
Acidic or
[H+]
[OH-]
pH pOH
basic?
7.4x10-3
ΑΣφ
3.3x10-10
M
pH
8.25
5.73
Is
to
fa
ho
II
10
insert
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You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc.
The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.
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Does the diagram show exothermic or endothermic reaction
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Please help me I’m stuck on this question
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Routine Chemical Tests for Urine - Word
Table Tools
Decy Joy Garriel
Table Design
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2 Share
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Home
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Design
Layout
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View
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P Find
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Aa v
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COLLEGE OF HEALTH SCIENCES
RESULTS AND OBSERVA TIONS:
PARTI: BENEDICTS TEST FOR REDUCING SUGARS
田
TUBE
PATIENT
COLOR
RESULT and
NO.
Before: Blue-green
OBSERVATION
WHITE PRECIPITATE:
1
Normal Patient 1
After: Greenish brown
2
Normal Patient 2
Before: Blue
LIGHT GREEN
After: Green
PRECIPITA TE:
3
WHILTE AND YELLOW
Pathologic Patient 1
Before: Blue
PRECIPITATE:
After: Green
BRICK RED
Before: Blue-green
After: Brick Red
Pathologic Patient 2
PRECIPITATE:
Generalization:
Page 5 of 8
947 words
English (Philippines)
K…
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Need help filling this out. It is the Data Sheet for Ch. 2 Qualitative Analysis. Very much appreciated!
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