Concentration Essay Topics

The rate of reaction

Before I conducted my research I tried to do my experiment using only 5cm2 of both the chemicals but found that this was to little and I found it to hard to decipher weather or not the chemical reaction had finish. So to help my experiment be more accurate I used 50cm2. Before I carry… View Article

Rate of reaction

Evaluation: I think that overall, our experiments/investigation was successful except for minor things such as the occasional odd results. On the first graph, these can be identified as when the lines representing 1. 25 and 1. 5 molar kept on crossing over each other. They were very similar. In theory, all the lines should be… View Article

The rate of rReaction

These results also support my prediction and I believe that the collision theory is quite accurate even though it is only a theory as it gives a very good explanation of what should happen and it has happened in my experiment. I am going to include 0. 25M in my main experiment as I believe… View Article

Sodium thiosulphate reaction

I am also not using pipettes as I do not need the reverse to the above; acutely small amounts. A pipette would rather hinder, than help my experiment by increasing the time required to set up each experiment as I have found with previous experiments involving small measurements. I shall repeat each experiment three times… View Article

Investigating how concentration affects rate of reaction

This means that you would need to use 200ml of the original 0. 01M solution with 50ml of distilled water to make 250ml of 0. 008M solution. Remember to keep all other solutions at a constant concentration throughout. Investigat the same range of concentrations as was used for potassium bromide, to ensure that a rate equation… View Article

Concentration Camp Sourcework

In Source 5 Reitlinger says that “more than a hundred thousand people must have known”. If this is correct then why did no-one take the blame for it at the end of the war? Or even do anything to help the Jews? How well supported this claim is depends on the other sources. Source two… View Article

Investigating the Difference in Isotonic Point in Sweet and White Potato

To observe whether equal sized white potato or sweet potato cores reached the isotonic point in the same concentration of sucrose solution. Introduction: Osmosis is diffusion of water from areas of high water potential to areas of low water potential. It does not require an input of energy. Plants use osmosis to transport minerals from… View Article

Water as a Universal Solvent

* Because of its high polarity, water is able to dissolve most substances. * In a solution, the positive hydrogen side of water is attracted to the negative parts if the compound it is dissolving while the negative oxygen is attracted to the positive parts * “Like dissolves like” – describes whether one substance will… View Article

NaCl solutions

The different concentrations of NaCl solutions led to the net movement of water molecules in the samples through osmosis. The samples soaked in higher NaCl concentrations, 0. 75 M and 1 M, slightly increased in mass due to less absorption of water. Samples soaked in less NaCl concentrations, on the other hand, became bulky due… View Article

Solution Preparation

1. Why should the solutions be prepared with 0.10M HCl used as solvent? a. What will happen to Fe3+ if the solution was not prepared using 0.10M HCl? b. Give the balanced equation for the 1st hydrolysis of Fe3+. c. What is the color of the product of 1st hydrolysis of Fe3+? d. What is… View Article

Colligative Properties

Abstract: Several experiments were performed to observe the colligative properties. This includes the freezing point depression, and osmotic pressure. Two ice baths were made, one with pure water, the other with salt water. The lowest temperature was then record for each bath and compared. The salt water had a lower freezing point than the pure… View Article

The Beer-Lambert Law and Its Limitation

Objective : 1. To determine the linear relationship between absorbance and concentration of an absorbing species. 2. To study the effects of molecular dissociation complex formation on the applicability of the Beer-Lambert Law. 3. To investigate the derivation and limitation of Beer-Lambert Law. Introduction: In optics, the Beer–Lambert law, also known as Beer’s law, the… View Article

Osmosis and Potato Chips

Osmosis is the movement of water from an area of high concentration to an area of low concentration across a semi permeable membrane. An osmotic system is established when a semi-permeable membrane is placed between two solutions. In this biological systems context, osmosis is the exchange of water between the potato cell and the surrounding… View Article

Determination of Copper by Complexation

ABSTRACT To determine the concentration of copper in an unknown solution by using copper complexation, solvent extraction and spectrophotometry. Standards are used to create a calibration curve and the unknown concentration of copper is then calculated by using the linear equation from the calibration curve. The concentration of copper in the unknown solution 201 was… View Article

Sedimentation: Tangent and Concentration

Sedimentation is the process of separating a liquid mixture of suspended particles into clear supernatant liquid and denser slurry having a higher concentration of solids. This is usually accomplished by allowing the particles to settle through the force of gravity, mechanically using centrifugal force, or electrostatically using an electric current. Continuous sedimentation tanks are usually… View Article