Question

Predict what will be observed in each experiment below. predicted observation (choose one) experiment Can A will make a louder and stronger fizz than can B. A student has two unopened 33 cL cans containing carbonated water. Can A has been stored in the garage Can B will make a louder and stronger fizz than can A. (32 °C) and can B has been stored in the fridge (8 °C) The student opens one can at the time, both cans make a fizz The fizz will be the same for both cans. There is not enough information to predict which can will make the louder fizz A bigger mass of NaCl precipitate will form in Sample #2 A pair of 100 mL samples of water are taken from a well bored into a large underground salt (NaCl) deposit. A smaller mass of NaCl precipitate will form in Sample # 2 Sample #1 is from the top of the well, and is initially at 32 °C. Sample #2 is from a depth of 50. m, and is The same mass of NaCl precipitate will form in Sample #2. initially at 42 °C. Both samples are allowed to come to No precipitate will form in Sample #2. room temperature (20. oC) and atm pressure. An NaCl precipitate is seen to form in Sample #1 I need more information to predict whether and how much precipitate will form in Sample #2.

Answer 1

Question 1:

When the can is opened; CO2 is released to atmospheric pressure.

We know; that for a fixed volume of gas; the pressure of the gas is directly proportional to its absolute temperature. So; the pressure of gas in the can at 8 ^o C is lower than the pressure of gas at 32 ^o C. So; the pressure change of CO2 is higher for the can at 8 o C and this can will fizz louder.

So; can B will make a louder and stronger fizz than can A.

Question 2:

As temperature increases solubility increases. So; water at 42^o C has more dissolved NaCl than water at 32 ^o C.

So; when both of them are cooled at same temperature ; sample 2 will produce higher mass of precipitate.

Correct option is: Option 1