State melted andresolidified to confirm a melting point

Reference no: EM13184794

a) There are two types of impurities that can contaminate a sample.What are they? How do they affect the observed melting points?

b) You have synthesized a new compound one which has never beenprepared. How would you determine its mp? What precautions couldyou take to insure that it is as accurate as possible?

c) You have a sample of an unknown substance, although you thinkyou know its identity. How could you establish whether or not thematerial is what you suspect?

d) Why shouldn't you use a sample that has been melted andresolidified to confirm a melting point?

e) A sample of an unknown compound has an melting point of145-154C. What conclusions would you draw? What actions would youtake?

Reference no: EM13184794

Questions Cloud

The van der waals equation of state holds for the n-propane : Assume the van der Waals equation of state holds for the n-propane molecule (C3H8). Find values for the constants a and b (online) and use these to calculate the density in (g ml^-1) at a temperature of 1000K and a pressure of 10 atm

Define the pressure is the same everywhere in the pipe : When the gas is not flowing, the pressure is the same everywhere in the pipe. How high above the bottom of the manometer would the mercury be in the arm connected to the pipe?

State mechanical equilibrium : Two liters of argon gas at 300 K and 5 atm are expanded against a constant opposing pressure of 1 atm until mechanical equilibrium is achieved.

Which distribution is more unequal based on the figures : Note that the first set of numbers represents the various incomes; whereas the second set of numbers represents the number of people earning each of these incomes. For example, in Avataria there are 50 people with the income of $100, 25 people wit..

State melted andresolidified to confirm a melting point : Why shouldn't you use a sample that has been melted andresolidified to confirm a melting point? e) A sample of an unknown compound has an melting point of145-154C. What conclusions would you draw? What actions would youtake?

Analyze the impact of government activity in markets : This is a self-reflection paper developed based on the classroom discussion around minimum wage. Explain the effect minimum wage has on the economy. List and describe both the pros and cons of the more recent increases in the federal minimum wage...

What factors affect the fuel efficiency of cars : To what extent would increased government involvement with regard to fuel efficiency affect the behavior of manufacturers · To what extent would increased government involvement with regard to safety affect the behavior of manufacturer · ..

Why market power leads to a deadweight loss : Explain why market power leads to a deadweight loss. Is the total deadweight loss from market power for the economy large or small. A student argues, "If a monopolist finds a way of producing a good at lower cost, he will not lower his price. Becau..

Explain the iron molar concentration in the serum sample : What is the iron molar concentration in the serum sample? Not that the following relationship may be used: Aunk/Aunk+std - Cunk/{Cunk+Cstd}

User Account

All Pages