Essays Tagged: "rate of reaction"

Enzymes

EnzymesExperiment #1- Effect of concentration of enzyme on rate of reaction.Variables- Concentration.Purpose- To find the amount of gas produced by different c ... tration of the peroxidase the more gas will be produced.Experiment #2- Effect of temperature on the rate of reaction.Variables- Temperature.Purpose- To determine if the peroxidase will be effected by ... oduce more gas until 38 degreesC, then less gas will be produced.Experiment #3- Effect of pH on the rate of reaction.Variables- pH levels.Purpose- To find the effect of the pH ranges on the peroxidase ...

(5 pages) 274 2 4.2 Oct/1996

Subjects: Science Essays > Biology

Conclusions drawn from My Experiment on the effect of Enzyme concentration on the time taken for a reaction to occur

ion of urease increases the time the enzyme solution takes to completely react with all of the substrate decreases. The rate of reaction at 1% urease is a lot slower than the reaction that occurred at ... ease. The more active sites will lead to more successful collisions between the enzyme and the substrate giving us more enzyme substrate complexes formed. During the experiment bonds are broken in the ...

(3 pages) 55 0 3.0 Feb/2003

Subjects: Science Essays > Biology

Varying rates of hydrolysis of the different isomers of Carbon, Hydrogen and Bromobutane.

Chemistry courseworkAim:To investigate and discover the varying rates of hydrolysis of the different isomers of Carbon, Hydrogen and Bromobutane.Scientific Research ... the collision frequency is proportional to the product. If every collision results in reaction, the rate of reaction will therefore equal the collision frequency. The rate of reaction is much less tha ... ndary) halogenoalkanes, only one species is required for the formation of the transition state: the rate-determining step is unimolecular. This is known as an Sn1 reaction.H+ ions = acid hydrolysis e. ...

(4 pages) 41 1 3.5 Apr/2003

Subjects: Science Essays > Chemistry

Investigating Some Factors Which Affect the Rate of Reaction.

Investigating Some Factors Which Affect the Rate of Reaction Between Hydrochloric Acid and Sodium ThiosulphateBackground InformationReactions ca ... rochloric Acid and Sodium ThiosulphateBackground InformationReactions can be completed at different rates. The rate of reaction is measured by observing how quickly reactants are used up or how quickl ... r through the solution and timing how long it takes for this marker to disappear will determine the rate of reaction.oChange in Mass - Reactions which produce gas can be carried out on a precise set o ...

(3 pages) 69 0 4.8 Oct/2003

Subjects: Science Essays > Chemistry

Chemistry, the effects of acid rain includes experiment with marble chips.

Chemistry coursework on acid rainI predict that as the temperature is increased the rate of reaction will increase. I also predict that as the concentration of the sodium thiosulphate ... n up in my analysis will have positive correlation, and will probably be curved, as the increase in rate of reaction will not be exactly the same as the concentration\temperature is increased. This ca ... er to reaction and thus react successfully. If solutions of reacting particles are made more concentrated there are more particles per unit volume. Collisions between reacting particles are therefore ...

(2 pages) 29 0 3.0 Nov/2003

Subjects: Science Essays

GCSE Chemistry - Sodium Thiosulphate Coursework

E Chemistry - Sodium Thiosulphate CourseworkWe must produce a piece of coursework investigating the rates of reaction, and the effect different changes have on them. The rate of reaction is the rate o ... ffect different changes have on them. The rate of reaction is the rate of loss of a reactant or the rate of formation of a product during a chemical reaction. It is measured by dividing 1 by the time ...

(10 pages) 83 1 4.1 Jan/2004

Subjects: Science Essays > Chemistry

How would the rate of reaction of Bisodel tablet affected by temperature?

IntroductionRate of reaction is a measurement of the speed of reaction. There are many factors that could affect ... sure and stirring, etc. I decided to choose temperature as my changing variables to investigate the rate of reaction.Bisodel TabletBisodel tablet is mainly made up of calcium carbonate, which is alkal ... ng stomachache or indigestion.AimMy aim is to find out the relationship between temperature and the rate of reaction.Word EquationCalcium Carbonate + Hydrochloric Acid Carbon Dioxide + Calcium Chlorid ...

(8 pages) 33 0 3.7 Feb/2004

Subjects: Science Essays > Chemistry

To study how concentration affects the rate of a reaction.

alled activation energy. The more often and faster the chemicals collide, the stronger the reaction.Rate of ReactionThe rate of a reaction depends on four things:*Temperature - When the temperature in ... e more collisions and more energy will be given out.*Concentration - If a solution is highly concentrated it means that there are a lot of particles that can collide. This means that there is more cha ...

(4 pages) 51 0 2.2 Mar/2004

Subjects: Science Essays > Chemistry

Effects of Enzyme Rate by Variables of Enzyme Concentration, Substrate Concentraion, Temperature and pH

AbstractThis study was undertaken to determine the effects of different environments affecting the rate of reaction, PNPP (p-nitrophenyl phosphate) + H20 ? PNP (p-nitrophenol) + H3P04. This reaction ... reaction is catalyzed by the enzyme phosphatase. Different environments produced different reaction rates as environmental factors affect the efficiency of phosphatase. This is because environmental f ...

(15 pages) 137 0 4.9 Apr/2004

Subjects: Science Essays > Biology

Indigestion tablets

which neutralises the most Hydrochloric Acid.HypothesisIn this experiment we are going to study the rate of reaction. We will try to find out how the speed at which an ordinary indigestion tablet will ... contains: Calcium carbonate Ph Eur 500mg.Also contains: Sugar, glucose, starch, talc, magnesium stearate.Citric acid flavours: Blackcurrant, lemon and orange.Colours: Violet (E124, E121), quinoline ye ...

(6 pages) 40 0 4.5 Apr/2004

Subjects: Science Essays > Physics

How the rate of reaction changes in a reaction between Hydrochloric Acid and Sodium Thiosulphate

Chemistry coursework:An investigation of the affect of the concentration an of the rate of reaction.Introduction.We are trying to find out the affect of acid concentration on the rate ... th sodium thiosulphate. The collision theory will be involved in this, for instance the more concentrated the acid we use, the faster the reaction will occur and the lower the concentration the slower ... the reaction will occur, this is because the collision theory says that if something is more concentrated then it will collide more because there will be more of the substance. We could use a catalyst ...

(4 pages) 58 0 3.6 Jul/2004

Subjects: Science Essays > Chemistry

An experiment investigating how the concentrations of the reactants affect the rate of reaction

An experiment investigating how the concentrations of the reactants affect the rate of reactionAimTo find out how the concentrations of the reactants affect the rate of reactionSc ... reactants affect the rate of reactionScientific knowledgeReactions can go at all sorts of different rates e.g. a slow reaction would be the rusting of iron and a really fast reaction is an explosion. ... g a mass balance and working out the volume of gas given off with the use of a gas syringe.Reaction rates are explained by the Collision Theory, which explains that the rate of reaction depends on how ...

(8 pages) 74 0 3.9 Jul/2004

Subjects: Science Essays > Chemistry

Chemistry Coursework

The Effect of Concentration on the Rate of Reaction between Hydrochloric Acid and Sodium ThiosulphateIntroductionIn this experiment we ... ium Thiosulphate. We are going to see what effect the concentration of Hydrochloric Acid has on the rate of reaction. We are going to keep the concentration of the Sodium Thiosulphate constant. We are ... reaction can take place. This diagram shows this:So the increase in concentration means increase in rate of reaction. If you doubled the concentration you would also double the amount of the product t ...

(6 pages) 42 1 2.7 Nov/2004

Subjects: Science Essays > Biology

Science-chemistry practical-To find out how the concentrations of the reactants affect the rate of reaction

Aim:To find out how the concentrations of the reactants affect the rate of reactionVariables:Possible variables that could speed up the rate of a reaction are;Temperat ... = Concentration=Independent VariableScientific knowledge:Reactions can go at all sorts of different rates e.g. a slow reaction would be the rusting of iron and a really fast reaction is an explosion. ... g a mass balance and working out the volume of gas given off with the use of a gas syringe.Reaction rates are explained by the Collision Theory, which explains that the rate of reaction depends on how ...

(7 pages) 26 0 3.0 Mar/2005

Subjects: Science Essays > Chemistry

Rates of reactions

Experiment: Investigation into the factors that effect the rate of reactionI am going to investigate how different factors affect the rate of a reaction.Introd ... action? A reaction is when two particles (reactants) join to form a new product or products.What is rate? Rate is a measure of how fast or how slow something is. Rate is a measurement of the change th ... time, any suitable measurement can be used such as seconds, minutes, hours or even days.What is the rate of a chemical reaction? The rate of a chemical reaction is how fast the reactants react.How to ...

(6 pages) 36 0 4.4 Jul/2005

Subjects: Science Essays > Chemistry

What factors can affect rate of reaction?

There are several factors which can affect the Rate of Reaction. These include:1) Temperature:At higher temperature, the particles have more kineti ... onstant temperature to assure that the experiment is a fair test. As the temperature increases, the rate of reaction will also increase positively.2) Concentration.This is the factor that we will be c ... in relation to solutions, where it refers to the amount of solute dissolved in a solvent. To concentrate a solution, you must add more solute, or reduce the amount of solvent. Evaporation would be an ...

(3 pages) 30 0 5.0 Mar/2006

Subjects: Science Essays > Chemistry

G.C.S.E chemical reaction - rates of reaction between sodium thiosulphate solution and hydrochloric acid.

HypothesisThe rate of a reaction is the speed at which a reaction happens. If a reaction has a low rate, that mean ... tion 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 other can happen in less tha ... ns take hundreds, maybe even thousands of years while other can happen in less than one second. The rate of reaction depends on the type of molecules that are combining. There are two possible ways of ...

(8 pages) 78 0 5.0 May/2006

Subjects: Science Essays > Chemistry

GCSE Science Coursework - Investigating the factors that affect the reaction between sodiumthiosulphate and hydrochloric acid

the reaction between sodiumthiosulphate and hydrochloric acidAim:To investigate the differences in rate of reaction between sodiumthiosulphate and hydrochloric acid as the concentration of sodiumthio ... run one batch of experiments, these amounts might need to be increased by up to three times to accurately carry out the experiment. As well as the liquids I will also need:Conical FlasksMeasuring Cyl ...

(1 pages) 959 0 0.0 Oct/2006

Subjects: Science Essays > Chemistry

Rate of reaction between Hydrochloric acid and magnesium

Aim:The aim of my experiment is to find out the rate of reaction between Hydrochloric acid (HCL) and Magnesium (Mg) in different temperatures. The p ... esium Chloride (MgCl2) and Hydrogen (H2).Prediction:I predict that as the temperature increases the rate of reaction also increases. To further explore the fact I further predict that the rate of reac ... or every 10° C rise in temperature. I further predict as the temperature rises by 10° C the rate of collisions will also double. Thus if the collisions double then the reaction between Magnesi ...

(3 pages) 14 0 3.0 Nov/2006

Subjects: Science Essays > Physics

Effect Of Temp On Yeast

rnage Boy aldy@nme.com Biology Coursework This experiment will find out how temperature effects the rate of reaction between yeast and glucose.The reaction is as follows C6 H12 O6 yeast 2C2H5OH + 2CO2 ... arbon Dioxide For the reaction to take place particles within reacting substances must collide. The rate of reaction depends upon how often and how hard particles collide with each other. In an enzyme ...

(9 pages) 15 0 0.0 Aug/2001

Subjects: Science Essays > Chemistry