Then we did our Sodium Chloride (a.k.a. Table Salt) lab. We had to figure out what amount of sodium chloride would dissolve in different amounts of water.
We went into groups or pairs, Adrienne was my partner.We gathered our designated materials on the tables in the back of the classroom, including a beaker and a graduated cylinder, and prepared our table.
The materials we used in this experiement included :
- sodium chloride (salt)
- 150mL of distilled water
- 100mL graduated cylinder
- weight paper
- electronic scale
- lab coat
- safety glasses
Our Chemistry Lab consisted of:
- A Graph (Mass of Salt vs Volume of Water)
- We included a title, axis points, data points, an appropriate scale and a line of best fit
- The following class, we finished the “conclusion” portion of the lab where we calculated our percent error and most of us were way off. But thats okay, Chemistry is all a learning experience and one day our percent error will be very low.
1. We put our coats and glasses on and made sure we listened to directions carefully from Mr.Doktor.
2. We safely plugged the scale in from sockets in the wall.
3. Next, we put the weight paper on the scale and Mr. Doktor put the sodium chloride on the weight paper for us.
4. We set the scales up so it would tell us how many grams we were taking off from it. Taking small amounts of salt, we dissolved it in water and did this until the salt wouldnt dissolve anymore. We knew that the salt would not dissolve anymore when we saw the crystals forming on the bottom of the beaker.
5. We repeated this 3 times, using 3 different amounts of water with the same temperature. The first amount, we used 10mL. The second amount, we used 20mL. The third amount, we used 40 mL.
6. Lastly, we recorded our data on the table provided. For all 3 different measurements of water we concluded that the more water, the more salt could be dissolved in it. Thus, the number of dissolved salt increased as we went up the mL scale.
However, we all know that error is a fundemental part of Science. Some variables in our experiment that could've played a role in the outcome are:
-The temperature of the water (hot,cold, or mild)
-The purity of the water (distilled or not)
-The incorrect unit measurement from the graduated cylinders and beakers
-Measuring the amount of water in the graduated cylinder incorrectly (not paying attention to the meniscus)
Ivys interpretation and drawing of her experience doing her first chemistry lab! Yay!
Post by Ivy Gloria/Edited by Ren Flores
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