The graph that I had and Table G had many similatiries; ours was not very accurate due to the lack of plots on the graph. Since there was only 10g of water, the KClO3 may have dissolved much quicker than it should have.
To make the KClO3 dissolve quicker, we increased the temperature of the solution by putting it on a hot plate. When surface area is increased, meaning we have to crush up the KCLO3 there is more room for collisions resulting in more effective ones.The solution was unsaturated when the KClO3 was undissolved at the bottom of the test tube and it was saturated when the KClO3 was dissolved.
Enrichment:A saturated solution is created when making rock candy. With water you add as much sugar as will dissolve, and then heat the water to dissolve more creating a solution that is supersaturated. After, you add the string into the water on where the candy will form. As the water cools the super saturated solution has more sugar in it than it can possibly hold. This causes the sugar to come out of the solution forming a precipitate which is the crystals of the rock candy.
Monday, April 25, 2011
Thursday, April 14, 2011
Lab 10.1
1. The sugar and salt samples are polar because they were not soluble in hexane, and because they were both sulble in water and ethanol.
2.The vegetable oil is the only non-polar sample because we found that it was soluble in hexane.
3.We concluded that polarity in ethanol isn't not at a constant rate because it did not dissolve both non-polar or polar molecules at the same rate for a same amount of time.
4.I would not expect ethanol to dissolve in any of the other two solutions because of its polarity.
5.NH3: polar, soluble, insoluble. I2: non polar, insoluble, soluble. HCl: polar, soluble, insoluble.
6. The ionic materials are polar whereas hexane is non-polar, therefore the compounds dissolve together.
Enrichment:
I think only the carbon dioxide would dissolve because out of the three gases,due to the fact it's the only polar compound. Oxygen and carbon dioxide need to be able to dissolve in water for any life to live because it's what they use to breathe.
2.The vegetable oil is the only non-polar sample because we found that it was soluble in hexane.
3.We concluded that polarity in ethanol isn't not at a constant rate because it did not dissolve both non-polar or polar molecules at the same rate for a same amount of time.
4.I would not expect ethanol to dissolve in any of the other two solutions because of its polarity.
5.NH3: polar, soluble, insoluble. I2: non polar, insoluble, soluble. HCl: polar, soluble, insoluble.
6. The ionic materials are polar whereas hexane is non-polar, therefore the compounds dissolve together.
Enrichment:
I think only the carbon dioxide would dissolve because out of the three gases,due to the fact it's the only polar compound. Oxygen and carbon dioxide need to be able to dissolve in water for any life to live because it's what they use to breathe.
Thursday, April 7, 2011
Blog 9.2
1) When HCl was added, the solution turned dark blue and shifted to the right.
2)When looking for the delta H, you can determine if it is exothermic or endothermic by looking at table I, so if there is a negative sign in the amount of kJ that means that the reaction is exthermic, and when there is a plus sign, that indicates that it is a endothermic reaction. You can determine this by looking at a potential energy chart.
3) Table F says that when they react together they are insoluble.
When you add AgNO3, the reaction changed to a pink color and shifted to the left.
6) When the soda container was opened, the reaction shifts to the right since all the pressure from the closed can has been released and because the amount of CO2 is increasing inside of the can.
ENRICHMENT:
1) CO2
2) Shift to the right
3) The amount of CaCO3 decreases
4) The more panting results in a thinner shell because there is less CaCO3
5) Change the temp and this would take advantage of LeChateliers princple because you would be controlling the temp
2)When looking for the delta H, you can determine if it is exothermic or endothermic by looking at table I, so if there is a negative sign in the amount of kJ that means that the reaction is exthermic, and when there is a plus sign, that indicates that it is a endothermic reaction. You can determine this by looking at a potential energy chart.
3) Table F says that when they react together they are insoluble.
When you add AgNO3, the reaction changed to a pink color and shifted to the left.
6) When the soda container was opened, the reaction shifts to the right since all the pressure from the closed can has been released and because the amount of CO2 is increasing inside of the can.
ENRICHMENT:
1) CO2
2) Shift to the right
3) The amount of CaCO3 decreases
4) The more panting results in a thinner shell because there is less CaCO3
5) Change the temp and this would take advantage of LeChateliers princple because you would be controlling the temp
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