ct what wilube observed in each experiment below. predicted observation experime

Question

ct what wilube observed in each experiment below. predicted observation experiment (choose one) O A bigger mass of NaCl precipitate will form in Sample a2. Two 250 mL samples of water are drawn from a deep well O A smaller mass of Naci precipitate will form in sample e2. bored into a large underground salt (NaCI) deposit. Sample #1 is from the top of the well, and is initially at precipitate will form in Sample a2. 42 oc. Sample a2 is from a depth of 150 m, and is initially O The same mass of NaCl at 8 oc. Both samples are allowed to come to room O No precipitate will form in Sample a2. temperature (20 eC) and 1 atm pressure. An NaCl I need more information to predict whether and how much precipitate is seen to form in Sample a1. precipitate will form in Sample a2. O A bigger mass of NaCl precipitate will form in sample a2. A pair of 100 mL samples of water are taken from a well will form sa 2. bored into a large underground salt (NaC) deposit. A smaller mass of NaCI precipitate in Sample #1 is from the top of the well, and is initially at The same mass of NaCl precipitate will form in Sample e2 32 C. Sample 2 is from a depth of 50. m, and is initially at 42 °C. Both samples are allowed to come to room No precipitate will form in Sample a2. temperature (20. eC) and 1 atm pressure. An NaCI I need more information to predict whether and how much precipitate is seen to form in Sample 1 tate Wil Boo

Explanation / Answer

Experiment 1:

The initial temperature of sample #1 is more than the initial temperature of sample #2. so less NaCl must have been dissolved initially in sample #2. If the temperature is brought to 200C

Then there will be a decrease in temperature for sample #1 : there may be formation of ppt

There will be an increase in temperature for sample#2 : there will be no ppt in this case as solubility will increase with increase in temperature

So correct answer: No ppt will form in sample # 2.

Experminet 2:

The initial temperature of sample #1 is less than the initial temperature of sample #2 so less NaCl must have been dissolved initially in sample #1. If the temperature is brought to 200C.

Then there will be a decrease in temperature for sample #1 [by 120C : there may be formation of ppt

There will be a decrease in temperature for sample #2 [by 220C ] : there may be formation of ppt, which will be more than the NaCl ppt in sample#1.

Answer is A bigger mass of NaCl precipitate will form in sample #2

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