Heath Chemistry Lab 18A: Factors Affecting Reaction Rate

2. When the magnesium ignited, removed it from the flame and held it over an evaporating dish or a pyrex watch glass until the metal had burned completely. Let the product fall into the evaporating dish.

If the concentration of the solution is increased the particles have less room to move around which creates a greater chance of collisions. The surface area of the reactant greatly affects the speed of which it reacts because if the reactant is grinded up or cut up the solution has more room to get to it. The reaction rate can be calculated by the formulae; rate of reaction = total amount of reactant used or product made ÷ time taken. (Collision theory and rates of reaction, 2013)

Many factors effect reaction rates, two shown above include temperature and concentration. Concentration affects the rate of reactions because the more concentrated a solution the more likely collisions between particles will be. This is simply because there are more particles present to collide with each other. When the temperature is higher, particles will

The atmospheric pressure of a room affects the reaction rate as it forces the particles closer together therefore inducing more collisions. The more energy released from the particles raises the temperature. The higher the concentration of the solutions the more particles there are therefore making it more likely to collide. The surface area can have an influence on the rate of reaction as the element had more exposed surfaces, allowing the reactant to collide with the element.

Magnesium ribbon was reacted with Hydrochloric acid in three different experiments to determine the charge on a metal ion. After running multiple tests in the three different procedures, the Crystallization method proved to be the best method for determining the charge of the metal ion by using mole to mole ratio.

Reactants collide with each other so new bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make new products

1. Label each substance on seven pieces of paper. Put two pieces of magnesium ribbon on the paper labeled “Magnesium”.

In this experiment it was observed that not all chemical reactions occur at the same rate. Chemical reactions occur when one or more substances are changed into other substances. The properties of a chemical reaction require three things. First, they need a source of energy for molecules to encounter each other. Second, they require to proceed at a steady rate. Third, they must proceed in a particular direction until they reach equilibrium. There are two types of chemical reactions that can occur: endergonic and exergonic reactions. In these reactions there are both reactants and products. In exergonic reactions the reactants (starting materials of a reaction) are higher than the products (results of a reaction). This is opposite for endergonic

It was researched that the greater the surface area of a solid, the faster the reaction rate. The collision theory states that the given reactants of a chemical reaction must successfully

Equation of magnesium and hydrochloric acid: 2 HCl+ + Mg [IMAGE]Mg2+ + H2 Measuring rates of reaction In this investigation there are two experiments that can be used to test rates of reaction. Using a gas syringe As more gas is produced the plunger inside the syringe moves out of the syringe so the gas can be measured by marks on the syringes length.

Have you ever seen magnesium? That’s because it can’t be found in the earth’s crust to the naked eye. Though it’s a pretty silvery white color. Bet you didn’t know that it’s in cattle feed, that’s random. In 1775, Joseph Black discovered magnesium while mixing electorally ceased mixture if mercuric oxide and magnesia, in Thessaly Greece. Magnesium is 30% lighter than aluminum. Bored yet? Stay with me, this is only the beginning.The chemical properties of the surface of magnesium is a metal covered with a thin layer of oxide that helps protect the metal from attack by air. Magnesium combines with oxygen at room temperature. It burns with a blinding white light when at higher temperatures. At the time when water reaches 1,994 degrees’ Fahrenheit

Collision theory states that the orientation and kinetic energy of molecules/atoms determine how fast (if at all) a reaction happens. Therefore, molecules that collide while facing the incorrect orientation, or at an inadequate speed, do not react. Correspondingly, molecules colliding at a faster pace increases the likeliness of colliding

When I conduct my experiment I think that as the concentration of HCL increases. The time taken for the HCL to react with Na2S2O3 will increase. I think this will happen because of the collision theory (1) ‘the more collisions in a system, the more likely combinations of molecules will happen.’ This helps understand that if we increase the concentration of HCL then the more likely there will be combination of molecules hitting each other at a faster rate meaning that if there are more collisions of molecules this would speed up a reaction by every molar the HCL goes up by.

Using chemical principles that you have learned this year, explain why you used copper wire to make the basket that held the magnesium in place.

Experiment to investigate factors affecting the rate of reaction between magnesium ribbon and hydrochloric acid