Introduction:
Dr. Wangdu and Dr. Mohammad wanted to examine the density of the aluminum cylinder without using any sort of measuring support or the Internet. This study aims to evaluate the importance of group work and the basic learning of the Energy and Matter is to experiment with lack of equipment by using formula to find out the answer.

Experimental Conditions:
They were only given 3 pieces of equipment: tape, the Aluminum Cylinder and a container. These pieces of equipment were challenging our knowledge to figure out the density of the aluminum. Before did the experiment, Dr. Wangdu and Dr. Mohammad used the formula P=mass/volume to figure out what information do they need. They used water’s density to solve this problem. Dr. Wangdu and Dr. Mo used water to fill the container up and measure the width, long, and depth of the container. Then put the aluminum cylinder, which is tapped, and measure the depth again. They also measure the radius and long of the aluminum cylinder. They used this way to take down the data of mass and volume of the aluminum. As the result, Dr. Wangdu and Dr. Mohammad used the formula P=mass/volume to figure out the density of aluminum.

Results:

Marisela

Interpretation:
The density of the aluminum is an exactly number, so the Doctors found the outcome, which is similar to the rest of the class.

Point(s) of Interest:
From the data above, and knowing the exact density of the aluminum，Dr. Wangdu and Dr. Mohammad found that their results was difference form the exactly one but it’s similar. The reason is that they used the density of water to figure out the density of aluminum by using formula and because the lack of the equipment which cannot help them to find out the precisely outcomes, so this is cause why the outcome is different from the exactly one.

Uncertainty:
Dr. Wangdu and Dr. Mohammad thought that regarding limited...

...Discussion and Conclusion
In this lab, a submarine Adventure: Density Saves The Day,; I had made many of the calculation for the best result of the lab.
My calculations section contains: the volume of the unknown metals, where I figure out the volume of each metal so that I will be able to determine its density in order to find its identity; the density of unknown metals, where I figure out the density of each metal so that I will be able to determine its identity; percent error between known and unknown metal densities, where I figure out my error on the calculation for finding the identity of the unknown metals; mass of water, where calculate to find out the mass of water by subtracting the mass of graduated cylinder with water by the mass of the graduated cylinder itself in order to find the density of ocean water; the density of ocean water; where I figure out the density of the ocean water by divided its mass by its volume, this will help me to find the density of the submarine as well since it’s equal to each other; volume of balloon needed to match salt water density, where I figure out the volume of the balloon by using the volume formula for the sphere shape which is representing the shape of the balloon; final volume of the submarine, where I divided its mass by its density to get its final volume so...

...MEASUREMENT OF PHYSICAL PROPERTIES: DENSITY
Introduction
According to the definition Density is the physical property that allows us to compare the mass of substances for a specific volume. In this Lab activity that took place in Deree College, Agia Paraskevi Campus we deal with the density of solids and density of liquids. The main purpose of this experiment is to understand what in reality density means, how we can measure it, how useful it is, what is the difference between density of solids and liquids, if the measurements that we did are been accurate and how we can calculate the percentage errors.
materials
3 different metals
A) copper
B) iron
C) aluminum
- 3 Different liquids
A) Water
B) Olive oil
C) Alcohol
- Balance
- Cylinders of 25ml, 100ml
- Calculator
DATA/RESULTS
In this Lab activity we saw the differences between the density of solids and the density of liquids.
Firstly we obtained three different solids a piece of aluminum, a piece of copper and a piece of iron, and we measured their masses by using the balance. Also, we measured their volume by using a cylinder with distilled water, then we have measured the volume, and then we put in the metal and recorded the total volumes. After that we calculated each density and we recorded the...

...purpose of the lab was to determine density of both regular and irregular shaped objects. Throughout the lab I found out that both of the small and large silver rod, do not have the same density, and also found out that the gold rod is not real gold.
My hypothesis is that since, the large and small silver rod has about the same density I believe that they would have about the same amount of volume. They both might displace the same amount of water on the graduated cylinder.
The Materials we used throughout the lab was:
Metal rods (Gold & Silver)
Wooden block
Water
Scale
Ruler
Graduated cylinder
Procedure thought out the lab:
1. First step we did was get the materials and went to out stations with our partners.
2. Second me and my partner measured the mass of the metal rods and the wooden block and recorded them on the worksheet.
3. After we filled up the graduated cylinder with water and dropped one of the metal rods and the water, the water amount that increased in the cylinder was the volume of the rode that was placed in.
4. We continued to measure and record the volume of each of the metal rods the same way as the first.
5. We measured the length, width, and height of the wooden block and recorded it. Then multiplied them altogether to get the volume of the block.
6. After gaining the measurements of the mass and volume of the metal rods and the wooden block, me and my partner then used both the mass and volume to...

...Lab Report
Question- Why do few objects float in water where as others sink?
Hypothesis- I think the objects that have a greater density than water will sink. So whichever object has a density more than 1g/cm³ will sink in water. This is known as relative density where the density of the substance is compared to the density of water. Hence, the object that has a greater mass: volume ratio than water will sink.
Materials-
* 1 measuring cylinder
* 1 rectangular prism
* 1 ball of plasticine
* 1 cylinder
* 1 cube
* 1 micrometer
* 1 vernier calliper
* 1 balance
Variables-
Independent- The object that was used
Dependent- The density of the object
Controlled- The water in the measuring cylinder
Procedure-
1. Get the 4 objects (rectangular prism, ball of plasticine, cylinder, and cube) that you’re going to experiment with.
2. Measure the mass of the rectangular prism by weighing it on the balance. Weigh it three times to get an accurate measurement. Then find the measurements of the length, width, and height using a vernier calliper. Use the formula l× b× h to find the volume. Divide the mass by the volume to get the density.
3. Measure the mass of the plasticine by weighing it on the balance. Weigh it three times to get an accurate measurement. Now fill up the measuring cylinder to a certain level and note it down....

...
Research:
The word density means the degree of compactness of a substance. There is density in everything in your everyday life (matter.)The formula to find density is d=m/v.The density of solids and liquids is usually stated as g/cm3, while gases are usually stated as kg/m3. A real life example of density would be that ice floats on water because it is less dense than water, or it sinks because it is more dense than water. The only substance that breaks this rule is ice. Archimedes was the first person to develop the idea of density, to find out if his crown was truly made of gold. He figures this out because he knows that the formula of density for gold is 19.3 g/cm3, and if a different type of metal was used, it would make the density higher or lower than 19.3g/cm3. In some cases, you can manipulate density. If you can change the weight or volume, the density will change because the formula for density has these variables. An example of this would be to make an aluminum foil boat, and place it on the water. It floats, because it is less dense than water. You then crumple up the aluminum foil, and it sinks because it is now less dense than water.This happens because you changed the volume, which is part of the density formula.
State
Material
Density...

...Eric Wu 117
Experiment 1.6: Determination of Density
Abstract:
The purpose of the experiment was to determine if density is an intensive or extensive property of matter. The experiment proves that density is an intensive property. The density of an object remains the same no matter how much of it is present. The density is an intensive property because mass and volume changes at the same rate.
Introduction:
This experiment was designed to determine if density is an intensive or extensive property. The density of an object is found by dividing its mass by its volume. The volume of a regular shaped object can be measured with a ruler. The volume of an irregular shaped object can be measured by putting it in water and figuring out the displacement the object creates. An intensive property is a property that remains the same when the size of the sample is changed. An extensive property is a property that changes when the size changes.
Hypothesis:
If the volume of a sample objects changes, then the density will stay the same because density is an intensive property.
Materials and Methods:
The materials used in this experiment are an electronic balance, graduated cylinder, and paper clips. The electronic balance was compact scale that measured the mass in grams. The...

...Experiment 22
Title:
Reactions of aldehydes and ketones
Aim:
The purpose of this experiment is to compare some reactions of ethanal and propanone.
Introduction:
We have chosen ethanal and propanone as relatively safe examples of aldehydes and ketones to illustrate their reactions in simple test-tube experiments.
The reactions or properties to be investigated are as follows:
A. Condensation (addition-elimination)
B. Oxidation
C. Triiodomethane (iodoform) reaction
Requirements:
Safety spectacles and gloves
6 test-tubes
ethanal, CH3CHO
propanone, CH3COCH3
2,4-dinitrophenylhydrazine solution, C6H3(NO2) 2NHNH2
sodium hydroxide solution, 2 M NaOH
Bunsen burner, tripod, gauze and bench mat
Beaker, 250 cm3
Potassium dichromate(VI) solution, 0.1 M K2Cr2O7
Sulphuric acid, dilute, 1 M H2SO4
Fehling’s solutions 1 and 2
Silver nitrate solution, 0.05 M AgNO3
Ammonia solution, 2 M NH3
Iodine solution, 10% (in KI (aq))
Procedure:
Part A
Condensation reaction with 2,4-dinitrophenylhydrazine
1. Put 1-2 drops of ethanal in a test-tube and add about 2 cm3 of 2,4-dinitrophenylhydrazine solution. Note your observations.
2. Repeat for propanone.
Part B
Oxidation reactions
A. With acidified potassium dichromate (VI)
3. Into a test-tube, put 5 drops of ethanal, 2 drops of potassium dichromate (VI) solution and 10 drops of dilute sulphuric acid.
4. Shake the tube gently and warm in a beaker of...

...EXPERIMENT 5 REDOX TITRATION: TITRATION USING SODIUM THIOSULPHATE Objectives 1. 2. To prepare a standard solution of potassium iodate for use to determine the concentration of sodium thiosulphate solution accurately. To acquire the proper techniques of carrying out a titration.
Introduction Redox titrations using sodium thiosulphate as a reducing agent is known as iodometric titration since it is used specifically to titrate iodine. The reaction involved is: I2 + 2Na2S2O3 I2 + 2S2O322NaI + Na2S4O6 2I- + S4O62-
In this equation I2 has been reduced to I- :2S2O32I2 + 2e S4O62- + 2e 2I-
The iodine/thiosulphate titration is a general method for determining the concentration of an oxidising agent solution. A known volume of an oxidising agent is added into an excess solution of acidified potassium iodide. The reaction will release iodine:Example: (a) With KMnO4 2MnO4- + 16H+ + 10I(b) With KIO3 IO3- + 5I+ 6H+ 3I2 + 3H2O 2Mn2+ + 5I2 + 8H2O
The iodine that is released is titrated against a standard thiosulphate solution. From the stoichiometry of the reaction, the amount of iodine can be determined and from this, the concentration of the oxidising agent which released the iodine, can be calculated. In an iodometric titration, a starch solution is used as an indicator as it can absorb the iodine that is released. This absorption will cause the solution to change to a dark blue colour. When this dark blue solution is titrated with the standardised thiosulphate...

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