No need to apologize - I am sincerely grateful for your response. I appreciate everyone's input as I'm proceeding with this experiment. Since my parents can't help, I rely on this website for help and direction. The 1st thing I do everyday is check the website.
In the meantime, I want to make sure the research to backup my hypothesis is clear and that I'm supporting it. Maybe, Louise and Chris G. can comment further on the revised information above.
I'm dropping off my balloons to the local lab this afternoon and will let you know how I make out.
Hope you're having a great day! THANK YOU.....
8th Grade Student
Michael wrote:Thanks Louise. I started a new thread by error. I will try to delete it. I copied it below so that you can reply. I thought it would be best to display it in bullets so that I don't confuse anyone. I'm trying to make it simple and clear so that everyone can follow what I'm saying. I want to hit all the key points so that I am supporting my Hypothesis.
- As your add salt to water, the salt slows down the molecules from expanding and freezing.
- As you add salt to water, the density of the water increases. A lower temperature is required to freeze the salt water.
- When water freezes, the molecules start holding on to each other tightly. This creates a pattern that actually takes up more space than when they were a liquid. This pattern forms a hexagonal structure like a snowflake.
This allows air space in the structure and creates space in the structure and the air make the ice light. So, when water freezes, the molecules take up more space causing the ice to expand larger than the water was.
- When salt water freezes, tiny platelets and needles of ice form over the surface of the liquid. The ice crystals incorporate water, but tend to leave the salt behind. So, the solution becomes saltier and saltier as the freezing process continues. The salt is excluded because salt has a different crystalline structure. It forms cubic crystals (with 4 sides) whereas ice is hexegaonal )with 6 sides.
- The 6 sided ice crystals build one on another to form sheets of ice. When salt (sodium chloride) is mixed into the water, chlorine ions grab the hydrogen atoms in H2O that interferes with the ice crystal building. It's difficult then for the ice crystals to connect and so they move slower to freeze.
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