Understanding how solubility varies with temperature and pressu.. Predict will b
ID: 589875 • Letter: U
Question
Understanding how solubility varies with temperature and pressu.. Predict will be observed in each experiment below predicted observation (choose one) experiment A student sees tiny bubbles clinging to the inside of an unopened plastic bottle full of carbonated soft drink. The student opens the bottle, and hears a loud hiss as gas under pressure escapes from the bottle. The bubbles will shrink, and some may vanish. The bubbles will grow, and more may appear. The bubbles won't change. I need more information to predict what will happen to the O bubbles Two 250 mL samples of water are drawn from a deep well bored into a large underground salt (NaCI) deposit. Sample #1 is from the top of the well, and is initially at 42°C. Sample #2 is from a depth of 150 m, and is initially at 8 °C. Both samples are allowed to come to room temperature (20 C) and 1 atm pressure. An NaCI precipitate is seen to form in Sample #1. A bigger mass of NaCl precipitate will form in Sample #2 A smaller mass of NaCl precipitate will form in Sample #2 The same mass of NaCl precipitate will form in Sample #2. No precipitate will form in Sample #2. I need more information to predict whether and how much precipitate will form in Sample #2.Explanation / Answer
Q1
the bubbles will grow, since it goes from high pressure system ( closed bottle) to low pressure system ( open atomsphere)
therefore, small bubbles will escape to the atmosphere
choose A
Q2
at high T --> more Nacl is soluble, thereofre, more precipitate form
at low T--> les sNaCl is present
therefore
a smaller mass of NaCl will form in sample #2, since it is cold, copmared to the otherone, this will be lower in precipitate if there is one
We require more precise data on this exercise
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