Essays Tagged: "Hydrochloric Acid"

Chlorine Debate, How White Do You Want it?

oup of metallicelements, was first made by Swedish chemist Carl Wilhelm Scheele in 1774, whotreated hydrochloric acid with manganese dioxide. In 1810, the English chemistSir Humphrey Davy determined t ...

(5 pages) 66 0 3.5 Feb/1994

Subjects: Science Essays > Chemistry

Tjis essay explains the evolution of the atomic theory and how it has changed over the last cenutry or so.

ndividual atoms. Forexample, hydrogen and chlorine always combine in a specific proportion tocreate hydrochloric acid. Dalton thought that atoms were small particles,like a small marble. Dalton's atom ...

(2 pages) 48 1 3.0 Jun/2002

Subjects: Science Essays

To investigate the factors that affect a chemical reaction: Calcium Carbonate + Hydrochloric Acid Calcium Chloride + Carbon Dioxide

PlanI have to investigate the factors that affect a chemical reaction:Calcium Carbonate + Hydrochloric AcidCalcium Chloride + Carbon DioxideThe easiest way to determine a change in the react ... e variables that affect this reaction are:稴urface Area稢atalyst稢oncentration of Hydrochloric Acid稵emperatureWith the help of 'Chemistry in Context' by G. Hill and J. Holman ...

(7 pages) 78 0 3.0 Nov/2002

Subjects: Science Essays > Chemistry

Rates of reaction

ion?1) The surface area of the magnesium.2) The temperature of the reaction.3) Concentration of the hydrochloric acid.4) Presence of a catalyst.In the experiment we use hydrochloric acid which reacts ... hydrochloric acid which reacts with themagnesium to form magnesium chloride. The hydrogen ions givehydrochloric acid its acidic properties, so that all solutions ofhydrogen chloride and water have a ...

(11 pages) 130 0 3.8 Jan/1996

Subjects: Science Essays > Chemistry

The Reactivity of Metals and Their Discovery

and react with several different things. Some metals react with oxygen, some with water, some with hydrochloric acid, and several other things. Also, some elements react more readily than others, and ... state, not in a compound. This is because it is not reactive; it doesn't react with air, water, or hydrochloric acid. Because it was found as a native element, there was no need for extraction in ord ...

(7 pages) 69 0 2.4 Nov/2002

Subjects: Science Essays > Chemistry

What happens to sodium thiosulphate when it is added to hydrochloric acid? How does the concentration effect the amount of sulphar produced?

Hydrochloric acid and thiosulphate are both clear liquids. They react to make sulphar, which if inha ... concentrations of thiosulphate must be poored separetly into the conical flask containing 15cm3 of hydrochloric acid. When the mixture goes cloudy the raction stops. A stop watch should be used to ti ...

(1 pages) 35 0 2.0 Nov/2002

Subjects: Science Essays > Chemistry

This essay is about the digestive system organs and functions. It covers information about the path food travels.

of the digestive system. It processes and stores food so the body can use it. It produces enzymes, hydrochloric acid, mucus, hormones and Vitamin K. The system absorbs nutrients to send throughout th ...

(3 pages) 188 0 4.6 Jan/2003

Subjects: Science Essays

Disappearing X Experiment. Coursework about sodium thiosulphate and hydrochloric acid. Method, Results, Fair Testing, Evaluation included. Was marked with a passing grade.

ntIntroductionI am going to investigate the rate of reaction between sodium thiosulphate (thio) and hydrochloric acid.Hydrochloric Acid + Sodium Thiosulphate "" sodium chloride + water + sulphurThe re ... e reaction.Apparatus1 small measuring cylinder1 large measuring cylinder1 small beaker1 large beakerHydrochloric AcidSodium ThiosulphateCross drawn on paperConical flaskWaterStopclockMethodFirst of al ...

(3 pages) 28519 0 3.3 Feb/2003

Subjects: Science Essays > Chemistry

Acid rain.

of nitrogen. North-eastern USA, has 62 percent sulphuric acid, 32 percent nitric acid and 6 percent hydrochloric acid. These gases are produced entirely from burning fossil fuels, mainly in power stat ...

(2 pages) 54 1 2.0 Apr/2003

Subjects: Science Essays > Environmental Science

The Rate Of Reaction Between marble Chips and Hydrochloric Acid.

We are going to do an experiment to see how surface area effects the rate of reaction when added to hydrochloric acid. I will add calcium carbonate (marble chips) to hydrochloric acid.When calcium car ... I will add calcium carbonate (marble chips) to hydrochloric acid.When calcium carbonate is added to hydrochloric acid a reaction takes place. The solution fizzes and gives off the gas carbon dioxide. ...

(6 pages) 103 1 4.3 Jul/2003

Subjects: Science Essays > Chemistry

Chemestry on sodiumthiosulphate turning hydrochloric acid milk.

Investigate the rate of reaction between sodium thiosulphate and hydrochloric acid, when you change the concentrationAim The aim of this experiment is to inve ... this experiment is to investigate what affects the rate of reaction between Sodium Thiosulphate and Hydrochloric Acid. By using the variable of sodium thiosulphate concentrationEquationsNa2S2O3 + 2HCl ... sodium thiosulphate concentrationEquationsNa2S2O3 + 2HCl = 2NaCl +SO2 H2O + SSodium thiosulphate + hydrochloric acid = Sodium Chloride + sulpur dioxide + water + sulpurBackground researchWhat is the ...

(12 pages) 40 0 3.0 Jul/2003

Subjects: Science Essays

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 can be completed at differe ... take place.In the following experiment, the effect of concentration on the rate of reaction between hydrochloric acid and sodium thiosulphate will be investigated. Concentration is easy to measure and ... .PredictionsAn investigation of the affect of the concentration of the acid in the reaction between hydrochloric acid and sodium thiosulphate will be conducted. Using previous knowledge on the subject ...

(3 pages) 69 0 4.8 Oct/2003

Subjects: Science Essays > Chemistry

Investigating the affect of concentration on the rate of reaction.

reactants in the solution. This will be investigated with the following experiment in which dilute hydrochloric acid and sodium thiosulphate solutions are mixed. This forms insoluble sulphur and the ... tus together and for the first experiment, measure the appropriate amount of the solutions (5cm" of hydrochloric acid, 50cm" of 0.15 molar sodium thiosulphate and 0cm" of water). Add the hydrochloric ...

(5 pages) 65 1 1.8 Oct/2003

Subjects: Science Essays > Chemistry

"Finding the relative atomic mass of lithium."

ond method I will titrate the resulting solution of lithium hydroxide with a known concentration of hydrochloric acid, this can also be used to calculate the relative atomic mass of lithium.Readings:* ...

(5 pages) 49 1 4.0 Nov/2003

Subjects: Science Essays > Chemistry

Lab report on a fischer esterfication

but they can be made much more reactive in the presence of a strong acid, such as sulfuric acid or hydrochloric acid. The mineral acid protonates the carbonyl group oxygen atom and gives the carboxyl ...

(3 pages) 84 0 0.0 Dec/2003

Subjects: Science Essays > Chemistry

Acid Rain

mostly NO2 and NO3 which has collectedly adopted the mane Nox). There is also a small percentage of hydrochloric acid that makes up hydrochloric acid as well. The equation is as follows:Sulfuric acid ...

(7 pages) 61 1 5.0 Feb/2004

Subjects: Science Essays > Atmospheric Sciences

Cocaine: Background and Effects (both physically and mentally)

rm. The paste is the most rudimentary, unrefined form. Additional processing of the paste by adding hydrochloric acid produces cocaine powder (cocaine hydrochloride). Cocaine powder is often administe ...

(4 pages) 113 0 3.0 Feb/2004

Subjects: Social Science Essays > Controversial Issues > Drugs & Alchohol

Rates if Reaction GCSE Cousrework

which to reactants react and make a product. The two reactants in particular are marble (CaCO3) and hydrochloric acid (2HCl); the products that they produce are carbon dioxide (CO2), water (H20) and a ... fferent levels of shaking.For the test, I will use an equal amount of marble and an equal amount of hydrochloric acid. The acid though will be at varying molarity. I will do each test twice and use 5 ...

(13 pages) 47 0 3.0 Feb/2004

Subjects: Science Essays > Chemistry

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

out the relationship between temperature and the rate of reaction.Word EquationCalcium Carbonate + Hydrochloric Acid Carbon Dioxide + Calcium Chloride + WaterBalanced EquationCaCO3 (s) + 2HCl (aq) CO ... goggles. Also, some other safety caution needed to be watching out during my investigation as well. Hydrochloric acid is corrosive; so that I ensured it would not split on the table or touch the skin ...

(8 pages) 33 0 3.7 Feb/2004

Subjects: Science Essays > Chemistry

Causes and symptoms of stomach ulcers. (Statistics and eating tips, ect.)

e of peptic ulcers is the destruction of the gastric or intestinal mucosal lining of the stomach by hydrochloric acid, an acid normally present in the digestive juices of the stomach. Infection with t ... , and weakening of the mucous defenses are also responsible for gastric ulcers. Excess secretion of hydrochloric acid, genetic predisposition, and psychological stress are important contributing facto ...

(3 pages) 136 5 4.2 Feb/2004

Subjects: Humanities Essays > Health & Medicine > Diseases