Precipitation Definition and 62 Threads

  1. H

    Question on Selective precipitation

    can anyone check if this is right? question : Explain if a solution contains both I− and Cl− at about 0.01 M, can we determine the amount of Cl− and I− independently by using gravimetric analysis? yes add [AG+] to precipitate out the I- first ( ksp is smaller) 0.01M * (0.01%/100%) =...
  2. Y

    Silly math problem on precipitation

    Hello everyone. I have this simple math problem that is worth 5 marks and I am not sure if it is right. Anyway it is on precipitation, here it is! Record the amount of water (in centimetres) the tipping bucket rain gauge received. Calculate the total volume of water this would equal if this...
  3. Y

    Silly math problem (precipitation)

    Hello everyone. I have this simple math problem that is worth 5 marks and I am not sure if it is right. Anyway it is on precipitation, here it is! Record the amount of water (in centimetres) the tipping bucket rain gauge received. Calculate the total volume of water this would equal if this...
  4. D

    Dan's Question: Al(OH)3 in Bayer Process Precipitation

    Hi. Im studying for a chemistry exam, and I am a bit unsure about something. As part of the electrochemistry component of the course i am required to know and understand various metal extraction processes. My book is fairly good for learning them, but one thing i am not sure about concerns the...
  5. C

    Solving the Mystery of AlCl3 & NaOH/NH4OH Precipitation

    Hey Chem geniuses! I am a struggling high school chem student who couldn't combine water with water without blowing something up so some help would definitley be appreciated. My chem final has been issued already and it is as follows: Put 5 mL of 3 M aluminum chloride solution in each...
  6. C

    Higher Chemical Concentration = Higher Temperature of Precipitation. Why?

    If two chemicals are mixed together If I had varying concentrations of the reactant solutions, why is it that the higher concentration mixtures will precipitate at a higher temperature? and lower concentration chemicals will precipitate at a lower temperature?
  7. S

    Higher Chemical Concentration = Higher Temperature of Precipitation. Why?

    If two chemicals are mixed together, say: Na_2SO_4 + CaCl_2 --> 2NaCl + CaSO_4 If I had varying concentrations of the reactant solutions, why is it that the higher concentration mixtures will precipitate at a higher temperature? and lower concentration chemicals will precipitate at a lower...
  8. D

    Why do unexpected precipitates form in precipitation reactions?

    Hi. If i was to conduct a few precipitation reactions, is there any reason why an unexpected precipitate will form, or any reason an expected precipitate will not be formed? I've though about things such as added ions in tap water (chlorine etc). Any other things?
  9. O

    Gravitational collapse, star precipitation and black hole formation.

    Could the process of star formation in a collapsing gas cloud transform the process of virialisation and ultimately promote the formation of a central black hole? Consider the following idealised and oversimplified scenario. Suppose a gas cloud massive enough to generate vast numbers of...
  10. D

    Precipitation Probability - HELP

    I am cursed with a horrible textbook. In regards to a normal distribution: when given a mean and standard deviation, I can compute a probability of precipitation in inches with no problem. IE: when asked what is the probability that rainfall in a given area will exceed a given # of...
  11. S

    Precipitation Reaction: K2SO4 + Ba(NO3)2

    The mixing of which pair of reactants will form in a precipitation reaction? 1) HCl + Ca(OH)2 2) K2SO4 + Ba(NO3)2 3) NaNO3 + NH4 4) CsI + NaOH It is 2 because BaSO4 is insoluble?
  12. R

    Understanding Precipitation Hardening: Coherent vs. Dispersion Mechanisms

    I'm trying to understand the mechanisms behind precipate hardening, and I am not able to find a good source to explain the differences in coherent precipitates and dispersion hardening. I understand that the crystal structure of the precipitate is different in dispersion hardening (that's what I...
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