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Topic: Lead(II) iodide


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In the News (Sat 20 Dec 14)

  
  some insoluble lead(II) compounds
It describes the reactions to form lead(II) hydroxide, lead(II) chloride, lead(II) iodide and lead(II) sulphate.
Lead(II) chloride can be made as a white precipitate by adding a solution containing chloride ions to lead(II) nitrate solution.
If you add colourless potassium iodide solution (or any other source of iodide ions in solution) to a solution of lead(II) nitrate, a bright yellow precipitate of lead(II) iodide is produced.
www.chemguide.co.uk /inorganic/group4/lead.html   (318 words)

  
 Lead(II) iodide - Wikipedia, the free encyclopedia
In its crystalline form it is used as a detector material for high energy photons including x-rays and gamma rays.
Lead iodide is toxic due to its lead content.
Lead iodide is formed from mixing lead (II) nitrate and potassium iodide.
en.wikipedia.org /wiki/Lead(II)_iodide   (115 words)

  
 Middle Part Salts Page
Using the preparation of lead(II) iodide as an example, the solution is a two stage process.
Lead(II) oxide is added to hot nitric acid and when an excess of oxide is present the mixture is filtered.
The halide ions, chloride, bromide and iodide, are tested for by adding nitric acid followed by aqueous silver nitrate and noticing the colour of the precipitate formed (see halogens in junior part).
www.rjclarkson.demon.co.uk /middle/salts.htm   (1499 words)

  
 Inter Certificate Chemistry News   (Site not responding. Last check: 2007-11-04)
Lead(II) iodide is a useful example which is easily made by mixing lead(II) nitrate and potassium iodide solutions, in a molar ratio of 1:2.
Weigh out about 1g of lead(II) iodide into a hard-glass test-tube and heat in a bunsen flame.
of lead(II) iodide one would have to measure it under pressure to prevent decomposition i.e.
www.ul.ie /~childsp/CinA/cina3/TOC2_InterCert.htm   (536 words)

  
 Solubility of Lead Iodide
Its solubility can be determined by measuring either the lead ion concentration or the iodide ion concentration in a saturated solution.
Determine the mmols of titrant added and the mmols of iodide ion present in the saturated lead (II) iodide solution.
From the class values listed on the chalkboard for the Ksp of lead (II) iodide determine which ones would be considered outliers at the 96% confidence level and rejected.
chem.lapeer.org /Chem2Docs/LeadIodide.html   (613 words)

  
 Lead(II) nitrate - Wikipedia, the free encyclopedia
When lead(II) nitrate is heated, it decomposes to lead(II) oxide, accompanied by a crackling noise referred to as decrepitation.
This solution reacts with soluble iodides such as potassium iodide to produce a precipitate of the bright orange-yellow substance, lead(II) iodide.
Lead(II) nitrate has some interesting supramolecular chemistry associated with it because of its coordination to nitrogen and oxygen electron donating compounds.
en.wikipedia.org /wiki/Lead_(II)_nitrate   (1115 words)

  
 John Straub's lecture notes   (Site not responding. Last check: 2007-11-04)
Understanding: Drops of a colorless solution of potassium iodide are added to the deep maelstrom formed within the beaker of a colorless solution of soluble lead(II) nitrate.
The potassium iodide is "trapped" and spun within the whirling vortex, where a yellow precipitate of lead(II) iodide forms.
Over time, the precipitate is slowly freed from the maelstrom, entering a region of the solution where the overall iodide ion concentration is much lower.
people.bu.edu /straub/courses/demomaster/pbi2vortex.html   (389 words)

  
 Balancing Equations
When the reactants in the reaction are ionic compounds in solution, cations and anions of the compounds are the parts exchanged.
An example of a metathesis reaction would be the reaction of potassium iodide solution and lead (II) nitrate solution.
What happens in this metathesis reaction is that iodide ions in potassium iodide switch with the nitrate ions in lead (II) nitrate.
library.thinkquest.org /10429/high/balequa/balequa.htm   (1240 words)

  
 Chemistry : Periodic Table : lead : compound data [lead (II) iodide]   (Site not responding. Last check: 2007-11-04)
Chemistry : Periodic Table : lead : compound data [lead (II) iodide]
Chemistry: WebElements Periodic Table: Professional Edition: Lead: compound data [lead (II) iodide]
For each compound, and where possible, a formal oxidation number for each element is given, but the usefulness of this number is limited, especially so for p-block elements in particular.
www.webelements.com /webelements/compounds/text/Pb/I2Pb1-10101630.html   (319 words)

  
 The Nature of a Chemical Reaction   (Site not responding. Last check: 2007-11-04)
Using the thin-stem pipets, simultaneously add 10 drops of lead(II) nitrate solution and 10 drops of potassium iodide solution on opposite sides of the petri dish as shown in the diagram.
The lead(II) iodide has a yellow color, which you observed in the reactions.
Since lead(II) iodide is not very soluble in water, a precipitate (solid) forms in Steps 3 and 4.
www.cci.unl.edu /Chemistry/LABS/LABS02.html   (1509 words)

  
 A Double Replacement Reaction
Potassium iodide in any form is relatively stable and non-toxic, but, as with all chemicals, should be handled with care.
The potassium iodide reacts with the lead (II) nitrate to yield lead (II) iodide and potassium nitrate.
However, lead (II) iodide is not very soluble in water, and thus precipitates out as a yellow solid.
www.nitrogenorder.org /experiment/dblreplace.shtml   (405 words)

  
 unit01-sect02-les01-lessonf   (Site not responding. Last check: 2007-11-04)
That's because the ionic bonding in each reactant is strong and the ions in each compound are hard to separate from each other.
When aqueous solutions of these compounds are mixed, the formation of lead(II) iodide is rapid.
When the two the solutions are mixed together, all that is required for a reaction to occur is contact between the lead(II) ions and the iodide ions.
www.cdli.ca /courses/chem3202/unit01/section01/lesson03/3-lesson-f.htm   (301 words)

  
 Precipitation theory   (Site not responding. Last check: 2007-11-04)
For example, if we mix together potassium iodide solution and lead(II) nitrate solution, a precipitate of lead(II) iodide forms.
Whilst the original salts were soluble, when they were mixed two new salt combinations became possible - lead(II) iodide and potassium nitrate.
All that has happened in this reaction is that the lead(II) ions have met up with the iodide ions to form the solid precipitate of lead(II) iodide.
www.hmcqc.org.uk /chemistry/precipitation_theory.htm   (298 words)

  
 Middle Part preparation of lead(II) iodide experimental sheet   (Site not responding. Last check: 2007-11-04)
That is when two clear liquids are mixed together and a reaction between them gives a solid precipitate, insoluble in water.
An example of this process is the preparation of lead iodide, method below.
Filter off the excess lead(II) oxide and allow the filtrate (the aqueous solution) to pass into a clean conical flask.
www.rjclarkson.demon.co.uk /middle/pbi2prep.htm   (222 words)

  
 Chemical Safety Data: Lead iodide   (Site not responding. Last check: 2007-11-04)
Lead salts are neurological poisons, so may damage the central nervous system and brain.
Do not allow lead iodide solid to come into contact with your skin.
Always make sure that you are working in an area with good ventilation so that you do not inhale the powder.
ptcl.chem.ox.ac.uk /~hmc/hsci/chemicals/lead_iodide.html   (160 words)

  
 [No title]
M lead(II) nitrate and 25.0 mL of 2.0 x 10
Under standard conditions the voltage generated by the oxidation of tin metal to tin(II) ions by iodine solid (which is reduced to iodide ions) is:
Rn (half-life = 3.82 days) is the most stable isotope of the noble gas radon.
www.chem.vt.edu /chem-dept/brewer/chem-ed/2001-1074/FinalExamKey.html   (1048 words)

  
 unit01-sect02-les05-lessone   (Site not responding. Last check: 2007-11-04)
Lead ions can be precipitated out of a solution as lead(II) iodide (yellow solid) using sodium iodide.
They can be precipitated out of solution (middle beaker) as lead(II) iodide.
To test for the presence of excess lead ions, the filtrate (a liquid that passes through a filter - beaker on right) can be treated with additional sodium iodide.
www.cdli.ca /courses/chem2202/unit01/section02/lesson05/3-lesson-e.htm   (249 words)

  
 AP Chemistry Fall 2005 Week 10 Lesson Plans   (Site not responding. Last check: 2007-11-04)
Observe what happens when either lead (II) nitrate or sodium iodide is present in excess
Prepare graphs comparing the actual and theoretical yields of lead (II) iodide
Compute the mole ratio required for lead (II) nitrate and sodium iodide to be completely converted into reaction products
www.frontiernet.net /~mrunyon/apchemfall05wk10plans.htm   (304 words)

  
 PART I
An excess of lead(II) nitrate was reacted with 15.0 g of potassium iodide.
A mass of 10.0 g of lead(II) iodide was recovered.
What is the percent yield of lead(II) iodide?
homepage.smc.edu /walker_muriel/Test2Fa05.htm   (852 words)

  
 CVC Images Pre-16 Catalogue: LEEDS UNIVERSITY TELEVISION
(vii) the separating funnel: iodine is extracted from aqueous iodine / potassium iodide using trichloromethane and diethyl ether as examples of heavier and lighter than water organic extractions respectively.
ID8 Lead (II) iodide (is formed from potassium iodide and lead nitrate)
IN Nuclear magnetic resonance spectrometry (nuclear magnetic resonance spectrum of methylphenyl ketone is obtained using a JEOL FX 90 Q nuclear magnetic resonance spectrom- eter)
www.rsc.org /chemistryimages/cvc_un16/lut.htm   (2018 words)

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