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Although Rf values technically remain constant if the following are held constant: * solvent system * adsorbent * thickness of the adsorbent * amount of material spotted * temperature They are generally not used to identify an unknown substance specifically, since these factors are sometimes difficult to control. Most generally, during a chromatography experiment an unknown sample can be compared directly to a known sample simultaneously, i.e. they will have similar Rf values.
What else can I help you with?
When might it be helpful to identify an unknown element?
Identifying an unknown element is helpful in various scientific and industrial applications, such as determining the composition of a material, investigating pollution sources, or developing new technologies. It can also be crucial in fields like forensic science, environmental monitoring, and quality control.
Why would you never use the sour taste property to identify an unknown acid?
Using just the sour taste property to identify an unknown acid is not reliable because many harmful substances also contain a sour taste. It's safer and more accurate to use laboratory tests or pH indicators to determine the identity of an unknown acid.
Why do you never want to tast or touch to identify an acid or a base?
If you have not identified it, it might be something that could hurt or kill you if you put it in your mouth.There are weak acids (as vinegar--acetic acid) and weak bases (like baking soda--sodium bicarbonate) that you could consume--but that assumes you already know what they are. If you taste an unknown subatance that turns out to be sulfuric acid, that's bad news!
How You are given three clear colorless unknown solutions and red and blue litmus papers. Describe the steps you might take to correctly identify each solution as acidic basic or neutral.?
Test each unknown solution with both red and blue litmus papers. If red litmus turns blue, the solution is basic. If blue litmus turns red, the solution is acidic. If both red and blue litmus papers remain the same, the solution is neutral.
Is the amount of substance in a certain volume the pressure?
No, the pressure is the force exerted by the substance on the walls of its container. The word that comes to mind for "amount of substance in a certain volume" is concentration, though it might also be a somewhat awkward way of describing density.The amount of substance in a certain volume is the density of the substance. Pressure means the force applied in a unit area. So the amount of substance in a certain volume is not the pressure.
Who might help you identify your values.?
Your values are embodied in what you practice daily. You might best come to more precisely define your values by auditing where your time goes for a week or so.
What relationship between the known and unknown do you need to solve the problem?
As part of planning, you might draw a diagram that helps you visualize a relationship between the known and the unknown. You might need to use a table or graph to identify data or to identify a relationship between a known quantity and the unknown. Hope that helps (:
How can you identify an unknown animal fur?
TO be totally sure, it could be DNA tested. Otherwise, a taxidermist might have a good guess.
What difficulties might you encounter if you tried to identify an unknown substance using its boiling point?
Identifying a substance based solely on its boiling point can be challenging because many substances have similar boiling points. Additionally, impurities in the substance can affect the boiling point, making it less reliable for identification. Different pressure conditions can also alter the boiling point of a substance.
When might it be helpful to identify an unknown element?
Identifying an unknown element is helpful in various scientific and industrial applications, such as determining the composition of a material, investigating pollution sources, or developing new technologies. It can also be crucial in fields like forensic science, environmental monitoring, and quality control.
Why would you never use the sour taste property to identify an unknown acid?
Using just the sour taste property to identify an unknown acid is not reliable because many harmful substances also contain a sour taste. It's safer and more accurate to use laboratory tests or pH indicators to determine the identity of an unknown acid.
What values should be taken into consideration when developing codes of ethics?
Identify prevailing social values before addressing current issues in the school or workplace. Examples of ethical values important to society might include trustworthiness, responsibility, respect, empathy, fairness, and citizenship.
Can you determine the identity of an unknown substance by calculating its density and observing chemical reactions?
Yes. You can divide the mass by the volume to find its density. Density is a property that can identify a substance.* * * * *No, you cannot! Density is not a property that can identify a substance unless you know that it is pure.All you can do is with mass and volume is determine the density of the substance, which could be a mixture. For example, sodium has a density of 0.97 g/cc and osmium a density of 22.6 g/cc. These two metals can be combined in various proportions to give an alloy with a density with any value between the two given numbers. I am not sure how stable such an alloy might be but the point is that you could make an alloy with the same density as tin, or iron, or lead or bronze.
Why do you never want to tast or touch to identify an acid or a base?
If you have not identified it, it might be something that could hurt or kill you if you put it in your mouth.There are weak acids (as vinegar--acetic acid) and weak bases (like baking soda--sodium bicarbonate) that you could consume--but that assumes you already know what they are. If you taste an unknown subatance that turns out to be sulfuric acid, that's bad news!
Can you determine the identity of unknown substance by observing its mass and volume?
No, you cannot. The mass and volume of an unknown substance will give you its density. Density is not a property that can identify a substance unless you know that it is pure but not if it could be a mixture. For example, sodium has a density of 0.97 g/cc and osmium a density of 22.6 g/cc. These two metals can be combined in various proportions to give an alloy with a density with any value between the two given numbers. I am not sure how stable such an alloy might be but the point is that you could make an alloy with the same density as tin, or iron, or lead or bronze or most other metals or metallic alloys that you care to name.
Can you determine the identity of-an unknown substance by observing its mass and volume?
No, you cannot. The mass and volume of an unknown substance will give you its density. Density is not a property that can identify a substance unless you know that it is pure but not if it could be a mixture. For example, sodium has a density of 0.97 g/cc and osmium a density of 22.6 g/cc. These two metals can be combined in various proportions to give an alloy with a density with any value between the two given numbers. I am not sure how stable such an alloy might be but the point is that you could make an alloy with the same density as tin, or iron, or lead or bronze or most other metals or metallic alloys that you care to name.
What might they disapproved of?
It is unclear who "they" refers to, but individuals might disapprove of various things such as unethical behavior, inappropriate actions, or decisions that go against their beliefs or values. Understanding the specific context would help identify what "they" might disapprove of.
