# chemistry

discuss if and when melting points can be used to determine the purity of organic and inorganic compounds

and

if and when melting points can be used to identify organic and inorganic compounds.

1. 👍 0
2. 👎 0
3. 👁 358

1. 👍 0
2. 👎 0
2. im not sure how to answer the questions.

1. 👍 0
2. 👎 0
3. I think the first one wants you to discuss IF melting points can be used to determine purity and if so, then how. I would think a discussion of the melting point range would be useful (what range indicates high purity and what range indicates low purity) as well as something about mixed melting points, how they are used, and what they mean with regard to purity. In addition something needs to be in the discussion that the melting point may indicate the purity BUT it doesn't tell you what any impurities are in the sample.

For #2, I think the discussion is to centered around the difference between indicating PURITY and indicating the IDENTITY. Particularly, I think the discussion should include using (or not using) the melting point of a sample to identify the sample beyond a reasonable doubt versus using derivatives and reactions of a sample to indicate the identity.

1. 👍 0
2. 👎 0
4. okay, that helps a lot thanks!

1. 👍 0
2. 👎 0
5. hey

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Physical Science

Which properties are characteristics of metalloids A. Hi electrical conductivity and high melting points B.Low electrical conductivity and low melting point C. Intermediate conductivity and high melting point*** D. Intermediate

2. ### TLC purity

Question: A student spots an unknown sample on a TLC plate and develops it in dichloromethane solvent. Only one spot, for which the Rf value is 0.95, is observed. Does this indicate that the unknown material is a pure compound?

3. ### Calculus

1. Locate the absolute extrema of the function f(x)=cos(pi*x) on the closed interval [0,1/2]. 2. Determine whether Rolle's Theorem applied to the function f(x)=x^2+6x+8 on the closed interval[-4,-2]. If Rolle's Theorem can be

4. ### Sublimes?

Question: An unknown compound gave a melting point of 230C. When the molten liquid solidified, the melting point was redetermined and found to be 131C. Give a possible explanation for this discrepancy. My answer: The compound

1. ### Same substances?

Question: Two substances, A and B, have the same melting point. how can you determine if they are the same without using any form of spectroscopy? Explain in detail. My answer: Perform a mixture melting point. In this procedure,

2. ### Sample purity

Question: A student spots an unknown sample on a TLC plate and develops it in pentane solvent. Only one spot, for which the Rf value is 0.05, is observed. Is the unknown a pure compound? What can be done to verify the purity of

3. ### org. chem.

A student who was isolating aspirin stopped the experiment after the filtration step with alumina. One week later, the methanol was evaporated and the experiment was completed. The melting point of the aspirin was found to be

4. ### Mixed melting point

Question: A compound melting at 134 degrees C was suspected to be either aspirin (mp 135C) or urea (mp 133C) Explain how you could determine whether one of these two suspected compounds was identical to the unknown compound

1. ### organic compounds

Discuss the types of trace elements in organic compounds.

2. ### CHEM

You are a researcher for a golf club manufacturer. You are given two identical looking cubes of a metal alloy. You are informed that they are made of the exact same material, but one is a crystalline, while the other is amorphous.

3. ### Chem

The melting point of KCl is 776 C whereas the melting point of NaCl is 801 C. 1. Identify the type of bonding in each substance. A: Both NaCl and KCl are ionic. 2. Account for the differences in the boiling points of the

4. ### Chemistry

Imagine that you have a pure sample of an unknown compound that you are told is either 2-naphthol OR benzoic acid. In the lab, you also have access to samples of pure 2- naphthol and pure benzoic acid. However, both of these pure