Fall season 2014
Time of test: 9/16/2014
Time of submitting: 9/23/2014
Test # a few
Purpose: the objective of this test was to explore the differences between physical and substance properties and between physical and chemical substance changes. Lab questions:
1 . Based on my own observation CaCl2 is sencillo in drinking water.
2 . Once 15% of HCl was added to CaCl2 as the teacher was performing the experiment I actually observed and realized some changes came about physically. It was physical alter because the color was very clear. 3. By having 15% of HCl of CaCo3, achieved it change chemically, I would notify this by simply effervescence and observation. some. The most obvious difference is that when ever CaCl2 was mixed with 15% HCl it changed bodily and the sturdy remain on the filter daily news is CaCo3 reacted to 15% it changed chemically. 5. Depending on my initial investigation I would personally say that CaCl2 is dissolving and CaCo3 is not really dissolving in water, even as can see the colorless normal water in filter. 6. Certainly, we would separate it by boiling the off to prove the hypothesis. six. The stable remain on the filter daily news is CaCo3, because it did not dissolve in water. almost eight. I would expect to see a dry CaCo3. The water will steam and dry off. on the lookout for. My solution is to query 7 is definitely consistent with the observations at this stage because effervescence occurred meaning CaCo3 was not dissolved, it absolutely was left over in the filter daily news. 10. Based on my observation I think Deposits A is not the same compound because while i added to filtering paper it bubbled when I included in residue A It didn't react. 14. No, because the color of remains B changed after it had been mixed with 15 drops of 15% HCl. 12. I do believe it was chemical substance because it can not the same any longer, also effervescence occurred, the moment HCl was mixed with remains B. 13. At step 9 CaCl2 was separated from the CaCO3.
14. The hot plate makes iodine sizzling while ice cubes keeps the dish awesome. 15. It can be going under physical change, and...