Essays Tagged: "precipitate"

Television's effect on the Political Process

to predict with campaigns now because a single performance before a huge audience can easily end or precipitate issues almost instantaneously. For instance, during the 1988 federal election, John Turn ...

(2 pages) 97 0 3.7 Nov/1996

Subjects: Social Science Essays > Communication Studies > The Media

The causative role of stress in depression: Gender diffences.

. Diathesis stress model [2]As the level of vulnerability increases, the degree of stress needed to precipitate a disorder decreases. Vulnerability is affected by biological and environmental factors. ...

(22 pages) 418 0 4.1 Apr/2003

Subjects: Humanities Essays > Health & Medicine

Chem Lab, do ions combine in definite ratios.

ns, the quantities of the solutions are all controlled variables. The chemicals are known to form a precipitate.MATERIALS-Safety glasses-10 ml copper (II0 sulfate solution-Seven test tubes-10 ml sodiu ... carbonate to the numbered test tubes.6.Swirled test tubes gently to mix the contents.7.Allowed the precipitate to settle for 7 minutes.8.Recorded observations.OBSERVATIONSTable 1.1Test Tube #(Column ...

(3 pages) 29 0 3.0 May/2003

Subjects: Science Essays > Chemistry

Investigating Some Factors Which Affect the Rate of Reaction.

rming. This can be calculated in three ways:oPrecipitation - When the products of the reaction is a precipitate, which will cloud the solution. Observing a marker through the solution and timing how l ...

(3 pages) 69 0 4.8 Oct/2003

Subjects: Science Essays > Chemistry

The effect of the halogen atom on the rate of hydrolysis

te of hydrolysisAim: to find the rate at which different halogenoalkanes hydrolyse to form a sliver precipitate in silver nitrate solution.Hypothesis: I think that 1-iodobutane will be the fastest to ... n note of. A timer will be started and after every minute the order of the test tubes with the most precipitate will be recorded.To make this a safe experiment safety gloves, lab coats and safety glas ...

(2 pages) 26 0 4.0 Mar/2004

Subjects: Science Essays > Chemistry

Ksp study

ith relatively low solubility in water.When we use the solubility rules to predict whether or not a precipitate will form when two solutions are mixed it is more accurate to say that the precipitate m ... en two solutions are mixed it is more accurate to say that the precipitate may form rather than the precipitate will form because if the solutions were very dilute, a precipitate might not form. What ...

(8 pages) 29 0 0.0 Mar/2004

Subjects: Science Essays > Chemistry

Precipitation Reaction and the Solubility

I.IntroductionIn this experiment we can see precipitate by observing variety of reaction. Precipitation will occur by precipitation reaction thi ... ll occur by precipitation reaction this is a reaction that two or more solution reacts to produce a precipitate. Also, there are often double displacement reactions. For example solution of Lead(² ... ssium iodide react:Pb(NO3)2(aq) + 2KI (aq) ¨ PbI2 (s) + 2KNO3 (aq)You will see that PbI2 is the precipitate.Now for example:LI (aq) + Na(NO3)2 (aq) ¨ NO PRECIPITATEYou will see that there was ...

(7 pages) 38 0 4.0 Apr/2004

Subjects: Science Essays > Chemistry

Percent Yield of a Precipitate

PurposeThe purpose of the experiment is to determine the percent yield of the precipitate; by performing double displacement reaction between solutions of two different compounds ... t whether it is soluble or not. Also, we can check after the reaction, which of the compound is the precipitate. Hence, before the experiment it is possible to predict whether the reaction will includ ... to predict whether the reaction will include precipitate by the solubility rules. In this case the precipitate will be BaSO4.HypothesisIn this experiment the reaction equation will be:CuSO4?H2O + Ba( ...

(5 pages) 29 0 4.0 Apr/2004

Subjects: Science Essays > Chemistry

Assess the impact by 1939 of Nazi social and economic policies on the mass of the German people

ndividual developments in German society, which were initiated by the Nazi regime, came together to precipitate a complete cultural transformation for the lives of German people by 1939.Nazi Seduction ...

(5 pages) 80 2 5.0 May/2004

Subjects: History Term Papers > European History > German History

Suicide Research Paper

ue of national importance. Of course no words can entirely describe the feelings and thoughts which precipitate suicide, nor is there a uniform set of reasons. However, a review of the characteristics ... hrenics. These illnesses share a common dysfunction in the brain, which has been seen in animals to precipitate impulsivity, violence, and risk taking. Lack of serotonin may produce a severely agitate ...

(6 pages) 217 0 4.0 May/2004

Subjects: Social Science Essays > Psychology > Depression, Stress & Suicide

Types of hemical reactions - Practical Report-(Refer to word document for subscripts,tables and correct characters.)

heated, It turned black and created a gas which bubbled through the limewater leaving a milky white precipitate.Discussion: When the Copper (II) carbonate heated, enough energy was present to start a ... ter (Calcium hydroxide) Calcium carbonate + WaterThis reaction leaves us with the calcium carbonate precipitate and indication that Carbon dioxide was the gas that was released through the first react ...

(7 pages) 40 0 1.0 Jun/2004

Subjects: Science Essays > Chemistry

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

er to measure. This is called the precipitation method. It is when the product of the reaction is a precipitate, which clouds the solution and is carried out by observing a marker through the solution ...

(8 pages) 74 0 3.9 Jul/2004

Subjects: Science Essays > Chemistry


strielle et Generale was published in French in 1916. Fayol argued that all industrial undertakings precipitate activities that can be categorised into six groups: technical, commercial, financial, se ...

(9 pages) 125 0 5.0 Oct/2004

Subjects: Businesss Research Papers > Case Studies

Chemical Reactions

stance has different properties than its reactants (2) a change in color (3) forming a gas or solid precipitate (4) or energy is transferred. There are five general types of chemical reactions. ...

(2 pages) 53 2 2.7 Nov/2004

Subjects: Science Essays

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

er to measure. This is called the precipitation method. It is when the product of the reaction is a precipitate, which clouds the solution and is carried out by observing a marker through the solution ...

(7 pages) 26 0 3.0 Mar/2005

Subjects: Science Essays > Chemistry

Prstitution Lesson for aspiring teachers.

sation and hypothesize about the actions that can be taken to ameliorate or solve the problems that precipitate sexual deviance, social stigmatization, de facto bondage, and personal suffering.Objecti ...

(5 pages) 45 0 1.0 Apr/2005

Subjects: Social Science Essays > Education

Investigation: How does the concentration affect the rate of a reaction?

There are three ways of measuring the rate of reaction:1. By observing the time taken for a precipitate to obscure a mark on a piece of paper/card.2. Change in mass (usually caused by ... ment.The reaction between sodium thiosulphate solution and hydrochloric acid produces a pale yellow precipitate (sulphur), a pungent smelling gas (sulphur dioxide), water and hydrochloric acid.We can ...

(5 pages) 35 0 3.0 Jun/2005

Subjects: Science Essays > Chemistry

CFUs/mL; Organoleptic Properties; and the effects of temperature, acid and enzymes on proteins in Selected Milks

hat pasteurised milk contained thermophilic microorganisms. Method B used rennet and acid to precipitate casein from whey. Whey proteins, -Lactalbumin and -lactoglobulin, were precipitated usin ... proteins, -Lactalbumin and -lactoglobulin, were precipitated using temperatures up to 100 oC. This precipitate was brown in colour and resembled skin. Part B of method B compared the affects of tempe ...

(9 pages) 38 0 0.0 Aug/2005

Subjects: Science Essays > Biology

Gravimetric Determination of Phosphorus in Plant Food.

d and weighed to find percent of phosphorus in compound. From the mass and known composition of the precipitate, the amount of original ion can be determined.Introduction: Gravimetric analysis is base ... alysis involves isolation of an ion in solution by a precipitation reaction, filtering, washing the precipitate free of contaminants, conversion of the precipitate to a product of known composition, a ...

(3 pages) 37 0 0.0 Nov/2005

Subjects: Science Essays > Chemistry

Analysis of "Dulce et Decorum Est"

raight for the dinner table of delectable deserts and royal etiquette. The image of food and dining precipitate in my head. Yet, skimming through the poem and engaging in an initial search for histori ...

(7 pages) 42 0 4.0 Feb/2006

Subjects: Literature Research Papers > North American > Poetry