This topic contains a solution. Click here to go to the answer

Author Question: You have a solution of salt dissolved in water. Why might a drop in temperature result in the ... (Read 113 times)

sarasara

  • Hero Member
  • *****
  • Posts: 521
You have a solution of salt dissolved in water. Why might a drop in temperature result in the dissolved minerals precipitating out of solution?
 
  What will be an ideal response?

Question 2

Limestone is a sedimentary rock that is found over large areas of the United States. Using this information, explain what the environment of deposition was like at the time of limestone formation and how the mineral in the limestone formed?
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

daiying98

  • Sr. Member
  • ****
  • Posts: 354
Answer to Question 1

Answer: One of the things that define objects in the three states of matter is how much thermal energy they have. The more thermal energy molecules have, the harder they vibrate, and the farther they move apart. As a result, when substances are warm, the molecules are farther apart than when that same substance is cold. When a mineral such as halite is dissolved in warm water, for example, there is more room between the water molecules for the halite molecules. However, when the temperature of the water drops, the water molecules move closer together, decreasing the room available for the dissolved mineral molecules. In the current example, this would force the precipitation of halite.

Answer to Question 2

Answer: Limestone forms in shallow marine environments, so without any additional information, it can be inferred that large areas of the United States were once covered with a shallow sea. However, limestone is often formed through the secretion of CaCO3 by marine organisms such as clams and corals, so the primary method of mineral formation is minerals formed by biological processes. This inference would be supported by the presence of marine fossils.




daiying98

  • Sr. Member
  • ****
  • Posts: 354

 

Did you know?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Did you know?

During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

For a complete list of videos, visit our video library