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Basic laboratory operations?
Basic laboratory operations include basic laboratory safety measures, biosafety, basic laboratory calculations, pipetting techniques, volumetric calculations, reagent preparation, microscope principles and quality control. These are the basic operations.
What is difference between titrand and titrant?
'Titrant' is the compound in the titration buret, mostly its concentration is exactly known.'Titrand' is the substance which is being analysed in the titration.Added:A typical titration begins with a beaker or Erlenmeyer flask containing a precise volume of the titrand (or analyte) and a small amount of indicator placed underneath a calibrated burette or chemistry pipetting syringe containing the (or reactant).When the endpoint of the reaction is reached, the volume of titrant (or reactant) consumed is measured and used to calculate the concentration of analyte, using:Ca = Cr . Vr . M / Vawhere M is the mole ratio of the analyte and reactant from the balanced chemical equation.
What is the precaution step of acid base titration?
1.The beaker,pipette and the flask should be washed properly with distilled water. 2.Pipetting has to be accurate in order to avoid excess addition of the titrating agent. 3.The flask containing the indicator (phenolphthalein or methyl orange) must be shaken well while acid is added to it. 4.The acid should be added dropwise. 5.Contamination should be avoided. 6.Excess of indicator should not be used. 7.The flask into which acid is added dropwise should be removed as soon as the indicator changes color. 8.Readings should be taken avoiding the parallox error.
What does it mean if the chlorine test turns orange - What does it mean?
What does it mean if the chlorine test turns orange - What does it mean ...
What is obtained mean?
what does obtained mean
What is pi petting?
you mean pipetting? if that's it then this is it: a pipette is a slender tube attached to or incorporating a bulb, for transferring or measuring out small quantities of liquid, esp. in a laboratory. so pipetting is to pour, convey, or draw off using a pipette. so I'm assuming its like giving someone a shot.
What does resuspended mean?
It means there's a thick/fixed/steady solid in your solution, which you have to make soluble again. Often the technique is as simple as pipetting the solution around your spot up and down, until it is completley dissolved.
Why do you assay your samples in triplicate when performing an elisa test?
Assaying the samples in triplicate is another control. If you do not get the same result in all triplicate wells, you have a problem with your experimental technique or you have made a pipetting error. In a clinical laboratory, the experiment would have to be repeated.
An alternative procedure for determining the density of a liquid would be to pipet a sample of the liquid into a weighed flask then reweigh the flask to determine the mass of liquid transferred?
Yes, pipetting the liquid into a weighed flask and then weighing it again would give you an indication of the density of the liquid. The answer would, however, not be as accurate as when you use specialized equipment for the measurement. Depending on your application this difference might or might not be significant. If you are in doubt and a hurry it could be best to do your measurement the way you described it and state your method clearly in your report. Just remember to use as big a volume as possible (eg. a 100ml pipette), to minimse the effect of possible pipetting inaccuracies (eg. parralax error, ect.).
What are the major sources of error in your determination of the molar mass?
1.) Some of the sample may have been lost in between testing that could resulted in slight error when calculating your molar mass. 2.) Weighing sample incorrectly and having too low/high std. deviation
Why do you never pipet by mouth in the chemistry lab?
Pipetting by mouth risks ingesting the chemical you are trying to suck into the pipet. Even if the solution is harmless, you can't be sure that the pipet itself is clean. Who knows what chemical was in it last? Instead, use a pipet bulb or syringe to draw up the solution. These are generally available in any laboratory where you might need to use a pipet.
Do's and donts in pipetting?
Do's: Use correct size pipette tips, dispense liquids slowly to avoid splashing, hold pipette vertically when aspirating and dispensing, calibrate pipettes regularly. Don'ts: Avoid dragging pipette tips across surfaces, never reuse disposable tips, do not over-pipette by pressing plunger too hard, do not blow out the remaining liquid in the tip.
Basic laboratory operations?
Basic laboratory operations include basic laboratory safety measures, biosafety, basic laboratory calculations, pipetting techniques, volumetric calculations, reagent preparation, microscope principles and quality control. These are the basic operations.
What are some nine letter words with 1st letter P and 5th letter T and 6th letter T and 7th letter I?
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern P---TTI--. That is, nine letter words with 1st letter P and 5th letter T and 6th letter T and 7th letter I. In alphabetical order, they are: pipetting
What are some nine letter words with 1st letter P and 5th letter T and 6th letter T?
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern P---TT---. That is, nine letter words with 1st letter P and 5th letter T and 6th letter T. In alphabetical order, they are: panettone panettoni pipetting preattune
What are some nine letter words with 2nd letter I and 5th letter T and 6th letter T and 8th letter N?
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern -I--TT-N-. That is, nine letter words with 2nd letter I and 5th letter T and 6th letter T and 8th letter N. In alphabetical order, they are: disattune pipetting rivetting
What are the advantages of using automatic pipette?
They're more time efficient. And if the pipette has been tested and is working fine, it is more accurate than the glass pipette, as it reduces the chances of human errors.There are many solutions for automatic pipetting. In some cases, robots like the one developed by Andrew Alliance, allow to use manual pipettes in a precise reproducible way. This makes the automation of pipettes, literally, a process with improved reproducibility.
