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Concentration

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12y ago

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What is a mohr method?

Mohr method is a Precipitation titrations method which is the concentration of an unknown substance in solution is determined by adding measured amount of a standard solution such as AgNO3 that react with unknown samples to determine CL, Br in Solid and solutions samples . NaCL + AgNO3 =====> AgCL + NaNO3. Br- + Ag NO3=====> AgBr + NO3- Then the concentration of the unkown can be calculated using the stoichiometry of the recation and the number of moles of standard solution needed to reach the End point. The mohr method uses chromate CrO4 2- ion as an indicator . By Known the stoichiometry and moles consumed at end point,we can determine the mount of chloride in an unknown samples. Saeed Yousef AL-Soumali


An unkown element is shiny and is found to be a good conductor of electircity what other properties would you predict for it?

Based on the properties you described, the unknown element is likely a metal. Metals are typically shiny and good conductors of electricity. You could also predict that it is likely malleable and ductile, as these are common properties of metals.


Why has he put the red blue and yellow paints next to the unkown paint chromatography?

The red, blue, and yellow paints are used as reference standard colors for comparison with the unknown paint sample after chromatography. By comparing the colors from the unknown sample to the standard colors, it helps in identifying the components present in the unknown sample based on their chromatographic separation pattern.


How does oxygen and nutrients and waste passed from the blood into the organs and back?

Oxygen and nutrients are transported in the blood to the organs through small blood vessels called capillaries. These substances diffuse from the bloodstream into the surrounding tissues where they are needed. Waste products produced by the organs are then picked up by the blood and carried away for elimination from the body.


What are seven physical properties used to identify unkown materials?

To identify a property, the first step you have to do is to decide which property you want to experiment with. Then, you test on a sample which is unknown. Finally, you compare and contrast the data with the known properties. :)Peace. :)