LAB 1
LAB: Sodium ChlorideIn class we were presented with a problem: What is the maximum amount of Sodium Chloride (Table Salt) you can dissolve in 200 mL of water?
In my group: Lauren, Kelly and ME! predicted that 68g of salt would be the max. amount dissolved in 200mL of water.
Main Materials Needed:
- graduated cylinder, beaker
- stir rod and scoopula (scoop & spatula ha-ha)
- scale
- salt and water
We used the smallest graduated cylinder, as we wanted to be as accurate as possible. We started with 10mL of water and went up in increments of 10. The scale was used to show us how much (g) of salt was taken out (pretty cool!) and basically we weighed the salt and added as much until it could no longer dissolve. Also with the help of Kelly's special ancient stir technique it gave us (in my opinion) rather accurate calculations. (THANKS KELLY!)
What We Observed:
TRIAL Volume of Water Mass of Salt (g)
1 | 10 | 2.70 g |
2 | 20 | 6.82 g |
3 | 30 | 10.71 g |
4 | 40 | 14.37 g |
With our data we were then to graph it out and use a straight line of best fit. With the four points (data points) we plotted and made a line of best fit all the way too 200mL which then gave us 68g of salt as our prediction.
The next class after this Mr. Doktor gave us the correct mass of salt that can be dissolved, which was 70.8g (DANG! we were close.)
With the correct amount given we were then to calculate our percent error in our answer, like this:
| 70.8 g - 68 g | x 100 = 4%
70.8 g
Not only was this fun but the group with the closest prediction would get extra points/percent marks, sadly we came second and group that won are lucky turtles.
- Sherilyn
posted by chemistry11 @ 12:29 AM
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