This was also quite a fun chapter. We get to stir until our hands sore though.
Firstly, we discussed what variables are to be kept constant. The amount of solvent, the temperature of solvent and the pressure of surroundings. Firstly, we added 1 g of salt into 20ml of water. Then we stirred till it completely dissolved. Then we added another 1 g of salt and added and stirred. This cycle repeated itself till we could not dissolve the salt anymore. We had to use a electronic balance so the answer must be rounded to 0.1g we put 5g but the answer was 5.0g. This cost me 1 MARK! Then we used 2 other items like the baking soda and iodine crystals. We found out that salt is the most soluble in water while iodine crystals are the worse.
This Lab Lesson was quite fun but it was very tiring. Luckily we worked in pairs and we took turns to stir, or else, what a tiring day it would be. Our hands would be filled with lactic acid.
1P14,
We were to check out the constant variables first. The volume of solvent, the temperature of solvent, the volume of solute and the pressure of surroundings. We were to dissolve one iodine crystals at a time and observe what happened. The solvent became yellowish. Then we had to use our Maths skills to answer some questions based on a graph. Science = Maths! Almost like it though.
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