Factors Affecting the Equilibrium Reaction of Iron (III) and Thiocyanate ions

The Rate Law for Chemical Reaction Among Hydrogen Peroxide, Iodide, and Acid To determine the rate law for a chemical reaction among hydrogen peroxide, iodide and acid, specifically by observing how changing each of the concentrations Experiment 3 Chemical Kinetics Objectives 1. To determine the rate law for a chemical reaction among hydrogen peroxide, iodide and acid, specifically by observing how changing each of the concentrations of H2O2, and H+ affects the rate of reaction. 2. To observe the effects of temperature and catalyst on the rate of reaction. Introduction Generally, two important questions may be asked about a chemical reaction: (1)How far do the reactants interact to yield products, and (2) how fast is the reaction?

Altering the Amount of Heat Produced When Magnesium Reacts with Sulphuric Acid When energy in the form of heat is given out of a reaction it is an exothermic reaction. Exothermic reactions usually need activation energy, the energy to break the bonds in the chemicals and to start the reaction. Once the bonds are broken new stronger bonds are formed. In an exothermic reaction energy in the form so heat is given out to the surrounding when the products are formed. Therefore there is an average rise in temperature; energy is lost which results in a negative ?H.

A neutralisation is either exothermic or endothermic. Exothermic reactions are the reactions that give out energy and therefore the temperature rises as a result of this. Endothermic reactions are the ones that take in energy from the surrounding and cause the temperature to decrease as a result of this. Making and breaking bonds either require energy or give out energy. When breaking bonds it requires energy, which means it's a endothermic reaction because the heat in the surrounding is absorbed to break the chemical bond.

In this experiment, the first two reactions are exothermic so the temperature of the solution and container will rise and some heat will be lost to the surroundings. Purpose: The purpose of this experiment is to calculate the heat of formation of magnesium oxide by studying a series of reactions involving magnesium and magnesium oxide and using Hess’s Law. Hypothesis: If the heat of reaction is found for two equations, then Hess’s Law will be able to determine the heat of reaction of the desired product. Materials: • S... ... middle of paper ... ...actual heat of reaction for Part II was -146kJ/mole. The heat of formation found for the formation of liquid water was -286kJ/mole.

If a product were removed from a system, the system would shift towards the products. If a reactant were removed from a system, the system would shift towards the reactants. Take the following example: A+2B⇌C+D. If you were to increase the concentration of A or 2B, the system would shift right to increase the concentrations of C and D. If you were to increases the concentration of C or D, the system would shift left to increase the concentration of A or 2B. [2] A change in the pressure of a system will only have an effect if the system is made up of gases.

In this experiment various solutions of lead nitrate and potassium iodide were mixed at a number of different dilutions. Through the observation of the amount – or lack of precipitate formed in each dilution, the mathematical relationship between the ions in a saturated dilution may be determined. This relationship is known as the solubility product constant, or Ksp, and is defined as follows, “The Ksp for an ionic solid is given by the product of the concentrations of the ions, each raised to the power of the coefficients in the dissolving reaction. '; (Heath Chemistry). The Ksp expression gives the maximum possible concentration of ions in a saturated solution without causing precipitation.

How Concentration Affects The Speed Of A Chemical Reaction Aim --- To investigate the effect of concentration of acid, in the reaction between dilute hydrochloric acid and magnesium ribbon. Preliminary Research -------------------- The rate of a chemical reaction is the measure of how fast the reaction takes place. In a reaction particles must collide and overcome the fixed amount of energy for the reaction to take place. This energy is called the activation energy. The rate of reaction depends on four factors: « Temperature - An increase in temperature produces an increase in rate of reaction.

This will allow me to determine what ratio is needed for the reaction to occur quickest (i.e. more acid than water, the faster the reaction rate). As I mentioned in the aim, I intend to find out what effect the concentration of the acid used will have on the rate of reaction between it and thiosulphate. Therefore, the only variable in this experiment will be the ratio of the concentration of the hydrochloric acid and thiosulphate. To vary this, I will dilute the acid with different amounts of water, changing the ratio of acid to water.

The purpose of this project was to discover how the pH level affects corrosion rate. The hypothesis was if the pH level affects the corrosion rate, then the lower the pH level is quicker the corrosion rate would be. This will happen because liquids below the pH level of 7 possess stronger acidic attributes. The effect of pH level on corrosion rate was determined by depositing a copper penny in each of three plastic cups, and then three different liquids by their pH levels, were assigned to be displaced into each cup formulating a chemical reaction to be observed. The results collected during this investigation contradicted with the intended result, this experiment was conducted to determine corrosion rate; Dana Puti Vingear (pH level: 4.5) 4 2/3 days, Tropicana Orange Juice (pH level 3.88) 6 1/3 days, and Sprite (pH level: 3.4) 8 days.

Le Chatelier's Principle Introduction: Le Chatelier's Principle states that if a change is made to a system in equilibrium, the system reacts in such a way as to tend to oppose the change, and a new equilibrium is formed. For example, whatever is done to the equilibrium, the system does the opposite. If something is added to a system at equilibrium, the system will behave as to remove it and vice versa. By increasing the concentration of a reaction, it will result in an increase of the rate of reaction. The new equilibrium will have a higher concentration of products too.