ipl-logo

How Does The Concentration Of Substances To Water Change Its Surface Tension?

669 Words3 Pages

Main goal of the experiment
The main goal of experiment is to determine, how adding different substances to water changes its surface tension, and how the concentration of those solutions influences surface tension. We would also like to examine, which of the chosen experimental method is more precise, reliable and efficient.
Theoretical background of the experiment
Surface tension is a physical phenomenon existing on contacting surface of liquid with gas, solid or other liquid, causing that the surface acts as elastic membrane. It may be also described as property of surface of liquid enabling it to resist an external force. Its mechanism is due to cohesive forces between molecules of liquid. The molecules are pulled in every direction by neighbouring ones. In the bulk of liquid, resultant pulling force is zero. However, as molecules approach the surface, pulling forces from one side become significantly smaller. This causes drawing of molecules backwards to the bulk. As overall effect, liquids tend to mass maximum of their molecules inside, which results in shaping surfaces in such a way to minimize their area (USGS Water Science School website). …show more content…

solids soluble in that liquid or other liquids, which are miscible with that under investigation. Substances that will be investigated during this experiment, i.e. dishwashing liquids and washing powders, belong to group called surface active agents, or, in short, surfactants. Their ability of lowering surface tension of solution is useful in processes of washing, cleaning etc.
Quantitatively, surface tension, denoted as γ, is described as work W required to change surface area of a liquid by a unit area

Show More
Related

Drops Of Water On A Penny Lab Report

626 Words | 3 Pages

In the second lab “Water down a String”, when I had first attempted to pour the water down the string, which was dry, it had failed and did not form into beads at first. After I had dampened it, and did a second trial, the water formed into beads and rolled easily down the string and into the second beaker. This again goes back to water’s high surface tension,

Read More

Calorimetry Lab Report Essay

723 Words | 3 Pages

With following the procedure, the experiment was completed very easily. The technique used worked very well. The graduated cylinder were dried after each trial to ensure each water level was equal. The air bubble were risen to the top to ensure the equal amount was measured. Systematic errors can not be eliminated by averaging In principle, they can always be eliminated by changing the way in which the experiment was done.

Read More

Ap Chemistry Penny Lab

716 Words | 3 Pages

Our hypothesis was partially correct, the property changing substances did have the weakest coherency with the lowest drop counts of 23(carbonated), and 14(soap), and pure water did have the strongest bond. What we also found was the the salt also dampened the liquid’s ability to hold onto a penny in large volumes, as all the different salts had a drop average of 24(28x2 & 16), five less than Tap water’s drop count (30). This led us to conclude that pure water has the strongest bond and that all foreign materials weaken the coherency of water. This evidence has led me to believe that similar substances are attracted and are more coherent towards themselves, in this case the water pieces get separated and generally less connected on a really small level due to the obstruction of foreign objects, this is why the different salts perform better than the huge air bubbles or the slippery properties of soap since the latter is more obstructive and the former dissolves with the water and blocks less. When studying a few other groups’ conclusions and data we did indeed find differences: some groups had differing data where a solution had better coherence than water itself which led to differing conclusions.

Read More

6.03 Calorimetry Lab

848 Words | 4 Pages

Synopsis This laboratory report gives an outline of the experiment which was carried out in order to measure the density of water at different temperatures via two different methods. The lab consisted of two parts. In the first part the density of water was measured by hydrometer. At first the density of water at room temperature was measured.

Read More

Methanol Vapor Pressure Lab

104 Words | 1 Pages

Based on the obtained results from the experiment, the unknown liquid was determined to be methanol. The results were very close to the theoretical values, all within 15.92 % error. In this experiment it showed that the methanol have different intermolecular forces at work and at different vapor pressures implying that the amount of intermolecular forces they exhibit affects the vapor pressure. Possible source of error that occurred throughout the experiment was that the temperature was hard to control leading to the variances between the temperature of the reading in the water bath and the actual temperature causing slight changes in the vapor

Read More

Of Dissolvent In The Water Affect The Number Of Drops That Can Fit On A Penny?

74 Words | 1 Pages

How does the type of dissolvent in the water affect the number of drops that can fit on a penny? We will attempt to find the answer to this question using the hypothesis “If we use salt water solution, then there will be more drops on the penny. ” We will use the materials salt, sugar, lemonade mix, flour, a beaker, a pipette, paper towels, a stirring rod, a graduated cylinder, and some tap

Read More

Beta Vulgaris Cell Lab Report

1061 Words | 5 Pages

The results can be used to understand more practical applications, like human cells for example. the experiment is ineffective way of observing the effect of alcohol on cell membranes and is a good education tool. The study is

Read More

Hydrate Formation And Growth In Pipeline Research Paper

470 Words | 2 Pages

Sub-cooled water inside the droplet will drain through these cracks and spread on the dry hydrophilic hydrate film. Hydrate-forming species close to the pipe wall may convert this water to hydrate quickly, often resulting in deposition of the hydrate/water droplet on the wall. In turbulent liquid systems the water phase is often distributed in the hydrocarbon phase as rough, unstable water-in-oil emulsions. As surface tension of the droplets increases due to the hydrate layer, the water droplets agglomerate to larger droplets or water lumps in order to minimise surface area, as shown in figure 2.15.

Read More

Informative Speech On Water Strider

156 Words | 1 Pages

A water strider can walk on water due to cohesion. Cohesion is the attraction between molecules of the same substance. To sum it up, cohesion pulls the water molecules together. This pull is the cause of surface tension. The water strider is small enough to be supported by surface tension.

Read More

Blood In Flight Research Paper

963 Words | 4 Pages

What significant physical properties of blood determine the shape of a blood drop in flight? A blood drop, which can be either a single drop or in large volumes, are held together by strong cohesive molecular forces that produces a surface tension within each drop and on the external surface. Surface tension are forces that pulls the surface molecule of liquid toward its interior, and decreases, as the force pulls the surface, causing the liquid to resist penetration. Gravity begins accelerating the drop downward, and the trajectory will take the drop to the floor or ground or whatever other object intervenes in its flight.

Read More

Cold Water Lab

630 Words | 3 Pages

Introduction The intent of this experiment is to understand how hot and cold water interact with each other by combining clear hot water and black ice cold water. I hope to learn more about how hot and cold water interact with each other. As of now, I know that cold water is denser than hot water. Knowing this I formed my hypothesis.

Read More

What Does Density Plays A Key Role In Interpreting Water?

1219 Words | 5 Pages

Imagine water layers floating over each other. This may seem impossible because many may wonder how a liquid can stay on top of a liquid without mixing. However, the phenomenon occurring is indeed possible! Density plays a key role in layering water. Density is basically the state of being compact, and can be changed by factors such temperature or dissolved salt.

Read More

Essay On Water Hydrophobicity

1964 Words | 8 Pages

Water on hydrophobic surfaces will display a high contact point. Superhydrophobic surfaces are exceptionally hydrophobic, i.e., greatly hard to wet. The contact angle of a water droplet surpasses 150° and the contact angle hysteresis is under 10°. This is also referred to as the Lotus impact, after the superhydrophobic leaves of the lotus plant. Rough and microstructured surfaces characteristically build hydrophobicity of hydrophobic surfaces through two altogether

Read More

Soap's Effect On The Surface Tension Of Water

864 Words | 4 Pages

Soap’s Effect on The Surface Tension Of Water By: Lusinda Garcia Biology I - Pre-AP December 10, 2017 Introduction Surface tension is when the surface of a liquid that’s in contact with gas, acts like a thin elastic sheet. Water has a high level of surface tension, which means that when the molecules on the surface of water are not surrounded by similar molecules on all sides, they're being pulled by cohesion from other similar molecules deep inside. These molecules bind to each other strongly but stick to the other mediums weakly. It has been proven many times that soap decreases water’s surface tension; however, there is still a vast amount of people that believe soap increases the elasticity of water’s surface tension. Soap’s negative

Read More

Lab Experiment: Osmosis Visking Tube Lab

830 Words | 4 Pages

Therefore, this experimentation indicated that the sucrose molecules cannot diffuse from the concentration of the dilute solution, while on the other hand the water molecules diffuse from the dilute solution to the concentrated one. Hypothesis: If the (independent variable) sucrose of the dilute solution is

Read More

More about How Does The Concentration Of Substances To Water Change Its Surface Tension?

Related Topics

Open Document