Physical properties are those that you can detect with your senses: sight, hearing, touch, taste, smell. With just a glass of water, you can explore physical properties of water.
Activity: Investigating Water
glass of drinking water,paper cup,pen,freezer,cooking pot,stove thermometer,piece of paper
Procedure:
1.Obtain a clear glass and fill it with water. Or, observe water as it pours from a faucet. List at least five physical properties of the water (five words that describe the water).
2.Fill the paper cup half full of water. Mark the height of water on the outside of the cup. Freeze the water overnight. Look at the height of the ice compared to the line you drew the day before. What property of water do you observe?
3.Fill a small sauce pan 1/3 to 1/2 full of water and heat it on the stove. Use your thermometer supplied with the lab kit to find the highest temperature reached. **Do not allow your thermometer to sit in the pan on the bottom. Hold the thermometer away from the pan bottom and measure the temperature of the water.** This physical property is called the boiling point of water. What is the boiling point of water according to your thermometer?
4.What would have to be done to the water to make it change chemically, that is, make it change into the substances that compose it —hydrogen and oxygen? Remember, boiling water will not change it chemically, but will only cause a phase change.
5.Find the Density of the water.
Density = Mass/Volume
In other words, how much matter is crammed into a given space
Here is some information you will need. The data has been collected for you.
Item Mass
Empty graduated cylinder 41.6 grams
Graduated cylinder containing 82 ml of water 123.1 grams
Mass of the water ? grams
Density of the water ? g/mL
What was the density of the water in g/mL?
Remember that you want to find the density of just the water. Show your all your work and data. List all measurements in a data table.
6.Now look at the piece of paper. Using your knowledge of atoms from the Nuclear unit,
Describe two differences in the physical properties of water and the piece of paper.
Describe reasons the paper's physical properties are different from the water's physical properties.
PLEASE I REALLY NEED HELP, DON'T REALLY HAVE TIME TO DO THE EXPERIMENT. PLEASE HELP ME.
Please see the other post.
Sra
I understand that you need help with answering the questions related to the experiment about investigating the physical properties of water. I will help guide you through the answers without actually performing the experiment.
1. List at least five physical properties of water (five words that describe the water).
To describe the physical properties of water, you can observe and use your senses. Some possible physical properties of water are:
- Transparent/Clear: Water is see-through, without any visible color.
- Liquid: Water is in the liquid state at room temperature (below boiling point, not frozen).
- Odorless: Water does not have a distinct smell.
- Tasteless: Pure water has a neutral taste.
- Wet: Water can make objects or surfaces feel wet when it comes into contact with them.
2. What property of water do you observe when freezing it?
When freezing water, you can observe its property of expanding upon freezing. The height of the ice formed will be higher than the level of the water before freezing. This property is due to the formation of ice crystals, which have a larger volume than the liquid water.
3. What is the boiling point of water according to your thermometer?
The boiling point of water is typically 100 degrees Celsius (212 degrees Fahrenheit) at sea level. However, depending on the altitude or the purity of the water, the boiling point can vary slightly. Please use caution when handling boiling water to avoid burns.
4. What would have to be done to the water to change it chemically into hydrogen and oxygen?
To change water into its constituent elements (hydrogen and oxygen) chemically, a process called electrolysis is required. Electrolysis involves passing an electric current through the water to break it down into hydrogen gas (at the cathode) and oxygen gas (at the anode). This is a chemical change that separates the water molecules into its elemental components.
5. What was the density of the water in g/mL?
To calculate the density of water, divide the mass of the water by its volume. We have the mass of water and the volume of water in a graduated cylinder, so we can calculate the density.
- Mass of the water: 123.1 g (mass of graduated cylinder with water) - 41.6 g (mass of empty graduated cylinder) = 81.5 g
- Volume of water: 82 mL
- Density of water: Mass/Volume = 81.5 g / 82 mL
6. Describe two differences in the physical properties of water and paper.
Two differences in physical properties between water and paper are:
- State: Water is in the liquid state (at room temperature), while paper is in the solid state.
- Transparency: Water is transparent and allows light to pass through, while paper is opaque and does not allow light to pass through.
Reasons for the differences in physical properties:
- State: Water and paper have different chemical compositions and molecular structures. The molecules in water are relatively loosely bonded and can move freely, allowing water to exist as a liquid. On the other hand, the molecules in paper are densely packed and bonded, resulting in a solid state.
- Transparency: The molecular arrangement in water allows light to pass through without significant obstruction. In contrast, paper contains materials (such as cellulose fibers) that reflect, absorb, and scatter light, making it opaque.
Remember, while I can help guide you through answering the questions, it is essential to conduct the experiment to obtain accurate results.