CHEMISTRY HIGH SCHOOL

Equal amounts of ethanol and water are mixed at room temperature and at 101.3 kPa. Which process is used to separate the ethanol from the mixture?

Answers

Answer 1
Answer:

Answer:

The process is known as fractional distillation

Explanation:

  • In order to separate the water from the ethanol at mixed room temperature with pressie of 1013 Kpa. The technique relies on the differential boiling points of the vapors that form a mixture above the flasks.
  • Thus the lower boiling points will lead to vaporize and rise through the column. Thus the remaining solution will bet concentrated and the amount of solvent it will decrease and substance with the lowest boiling point or room temperature will be collected first.
Answer 2
Answer: The answer is (1) distillation. Because the ethanol and water will mix well to form a solution

Related Questions

When a substances is dissolved in fluid, the substance is referred to as the ______, the fluid it dissolves into the ______, and the entire mixture is called the _______
An atom that has gained or lost electrons is called _____.a cationan ioninerta molecule
When a system performs work on the surroundings, the work is reported with a negative sign. True of False
What is the solute and the solvent in a carbonated drink?
Atoms in a stay in a fixed position and have no freedom to move.

Which sample is a homogeneous mixture?A) NaCI(s)
B) NaCl(aq)
C) NaCl(g)
D) NaCl(ℓ)

Answers

NaCl(aq) is a homogeneous mixture. Hence, option B is correct.

What is a mixture?

A mixture is a substance that is made up of two or more substances that are not chemically combined and in fixed proportions.  

Homogeneous mixtures are present with a similar uniform appearance and composition throughout. Examples are steel, air, salt water, etc.

Homogeneous mixtures may either be, a colloid or a solution.

An aqueous sodium chloride is a homogeneous mixture because NaCl completely dissolves in water, thus giving a single visible phase.

Hence, option B is correct.

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NaCl(aq) is a homogeneous mixture.

An aqueous sodium chloride is a homogeneous mixture because NaCl completely dissolves in water, thus giving a single visible phase.

Further Explanation

Mixture  

  • A mixture is a substance that is made up of two or more substances that are not chemically combined and in fixed proportions.  
  • A mixture may have several varying physical properties.
  • There are two types of mixture:

Homogeneous mixtures  

  • These are mixtures with a similar uniform appearance and composition throughout. Examples are, steel, air, salt water, etc.
  • Homogeneous mixtures may either be, a colloid or a solution.

Solutions  

  • Solutions are types of homogeneous mixtures containing two or more substances in a single phase.
  • Solutions contains, a solute which is the substance that dissolves in the other substance, and a solvent which is the substances that dissolves the solute.
  • For example, in a salt solution, water is the solvent and salt is the solute.

Colloid  

  • A colloid is a homogeneous solution that has an intermediate size particles between a suspension and a solution. Examples of colloids are fog and milk.  

Heterogeneous mixtures

  • This is a type of mixture that contain different substances or two or more phases of matter.
  • The components of heterogeneous mixtures are not uniform such that different samples of the mixture are not identical to each other.  
  • Examples of heterogeneous mixtures are; blood, soil, Gravel, etc.

Suspension  

  • It is a type of heterogeneous mixture made of larger particles that are visible and normally settles when the mixture is undisturbed.
  • Examples include, tomato juice, fine sand, etc.

Keywords: Mixtures, homogeneous mixture, Heterogeneous mixture

Learn more about:  

Level: High school  

Subject: Chemistry  

Topic: Mixtures and separation of mixtures  

Sub-topic: Types of mixtures  

Salinity is a measure of which of the following in water?a. carbon dioxide
b. oxygen
c. dissolved salts
d. sand

Answers

best answer is C. your welcome

To prevent accidental poisoning, you should NOT __________.a. mix chemicals in well ventilated areas
b. follow the instructions on the label
c. keep materials in unlabeled containers
d. use chemicals in well ventilated areas

Answers

Answer: option C. keep materials in unlabeled containers.


Justification:


Indeed, keeping materials in unlabeled containers is a risky, dangerous, bad practice.


Labels should be according to international standards. That is, further to the name of the product, labels must signal the danger associated with the product: whether it is poison, toxic, flammable, acid, caustic, explosive, or harmful to the body or the enviroment.


On the other hand, the other options, a. mix chemicals in well ventilated areas, b. follow the instructions on the label, and d. use chemicals in well ventilated areas, are good safety practices, among many others.

Answer: C

Explanation:

Keep materials in unlabeled containers

How many molecules are in 10 moles of Hydrogen?

Answers

Answer:3.2

Mass:32

Molecular weight: 10

Moles: 3.2

A fossilized animal that was killed by a volcanic eruption has 6.25 percent of its original amount of carbon-14 remaining; this radioisotope has a half-life of 5730 years. How long ago did the volcano erupt?a) 34,380 years agob) 22,920 years agoc) 17,190 years agod) 9,168 years ago

Answers

With the assumption that the animal is 100kg the remaining mass is 6.25. (assumption of mass will not matter since the decrease in mass is in percentage.) 

To answer this we use the formula A=Aoe^-(ln2/t1/2)t
where 
A- final amount (6.25kg)
Ao - initial amount (100kg)
t1/2 - half life (5730)
t - time it takes to change A to Ao

plugging in the values 
t= 22920 years ago. 

A different student is given a 10.0g sample labeled CaBr2 that may contain an inert (non-reacting) impurity. Identify a quantity from the results of laboratory analysis that the student could use to determine whether the sample was pure.

Answers

Answer:

Melting Point.

Explanation:

In testing of a sample has impurities, we have to check the samples’s melting or boiling points or we a separation technique called chromatography.

Now, CaBr_2 which is calcium bromide is a White Hygroscopic Powder. Therefore it is a solid.

Now, a pure solid will always have a fixed melting point which means that it will melt completely at only one temperature.

However, if there are impurities, the melting point of a substance is affected in two ways:

-It's lower than than the fixed melting point

- It would melt at a range of different temperatures as opposed to a fixed temperature for the pure form.

Therefore, a quantity that can be used to determine whether the sample was pure will be melting point.

Final answer:

The student could analyze the melting or boiling point of the CaBr2 sample to determine its purity.

Explanation:

In order to determine whether the sample of CaBr2 is pure, the student can analyze the melting point or boiling point of the compound. The pure compound will have a specific melting and boiling point, while the presence of impurities can cause a change in these values. By comparing the experimental values of the sample with the known values of pure CaBr2 the student can determine whether the sample is pure or contaminated.

A pure solid, on the other hand, will always have a set melting point, meaning that it will only melt fully at that one temperature. The melting point of a substance, however, is impacted by impurities when it is lower than the fixed melting point. Additionally, in contrast to the pure form's constant temperature, it would melt at a variety of various temperatures.

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