Chemical Reaction : Chemical Reactions

The experiment is to observe a variety of chemical reactions and to identify patterns in

In reference to the collision theory, molecules act as small spheres that collide and bounce off each other, transferring energy among themselves when the collide. In order for a reaction to occur, there must be collisions between molecules. Through experimentation, factors are discovered that influence the reaction rates of chemical reactions include the concentration of reactants, temperature, surface area, the physical state of reactants, and a catalyst. This experiment regarding the factors that affect reaction rate tests the effects of increased concentration and

A reaction rate is the speed at which a chemical reaction occurs. The reaction rate is affected by surface area by increasing the more surface area there is, because there are more particles exposed to the other reactant. For example, if a solid is grinded into a powder, the reaction rate will be quicker as there is more surface area.

Introduction: The rate of a reaction is the speed at which a chemical reaction happens. If a reaction has a low rate, that means the molecules combine at a slower speed than a reaction with a high rate. Some reactions take hundreds, maybe even thousands, of years while others can happen in less than one second. (Chem for Kids, 2016). Reactions require collisions between reactant molecules or atoms. The formation of bonds requires atoms to come close to one another. New bonds can form only if the atoms are close enough together to share electron. Higher temperatures make the collisions between molecules more violent. The higher temperatures mean higher velocities. This means there will be less time between collisions. The frequency of collisions will increase. (Chem, 1999) H2O2 is the chemical formula for hydrogen peroxide. The decomposition of hydrogen peroxide will break down into oxygen and water.

A chemical reaction is when substances (reactants) change into other substances (products). The five general types of chemical reactions are synthesis (also known as direct combination), decomposition, single replacement (also known as single displacement), double replacement (also known as double displacement), and combustion. In this lab, the five general types of chemical reactions were conducted and observations were taken before, during, and after the reaction. Then the reactants and observations were used to determine the products to form a balanced chemical equation. The purpose of this lab was to learn and answer the question: How can observations be used to determine the identity of substances produced in a chemical reaction?

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

This is a simple equation that doesn’t properly prove the reaction. It is very complex and starts with this:

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

- 3058 kJ/mol = [6 (- 393.5) + 3 (- 285.85)] – [X + 0] = - 161 kJ

Jack Zhou Eric Lonrenzo Chemistry section # Date Chemical Reactions Introduction: The purpose of the lab was to create and observe the 4 kinds of chemical equation, and to identify reactants and products of those reactions.

Purpose: The purpose of this experiment was to observe the many physical and chemical properties of copper as it undergoes a series of chemical reactions. Throughout this process, one would also need to acknowledge that even though the law of conservation of matter/mass suggests that one should expect to recover the same amount of copper as one started with, inevitable sources of error alter the results and produce different outcomes. The possible sources of error that led to a gain or loss in copper are demonstrated in the calculation of percent yield (percent yield= (actual yield/theoretical yield) x 100.

Fatima Gowher Uzma Gowher Tanishq Gadkari Fritz Flores Block 1 Chemistry Honors AbstractWhat happens when two merely different “things” are combined? By things, I mean two different substances.

There are many reaction types that can occur when compounds come together to form different types of products. In chemistry, there are eight different basic types of reactions. The eight basic reactions include: combustion, synthesis, decomposition, precipitation, single-replacement, double-replacement, acid/base, and redox reactions. These reactions are categorized into their reaction type by their differences and similarities. The first type of reaction is combustion.

Chemical reactions are important.Without a freezer coud ylou have nice cold ice cream and without an oven could you have roast chicken or oven fries and the answer is no. Ovens and freezers are very similar as inside heaps of chemicals are reacting to the food so it is either hot or cold.

When a chemical reaction happens atoms are rearranged and new chemical substances are formed. In a chemical reaction there are changes of energy often in the form of heat. Gases expand to fill any space that is available, however a gas is easier to see when it’s a bubble. Mixing baking soda and vinegar together will create a whole bunch of bubbles at once. Baking soda is made from the deposits of white water soluble solid in powder,however it is pulled out by a water process that uses no chemicals. Vinegar is a liquid including mainly of acetic acid and water. The amount of friction between objects depends on how hard objects, push against each other. Friction is the force that slows objects down when they rub together.