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11 Nov 2019
Predict what will be observed in each experiment below predicted observation (choose one) experiment A pair of 100 mL samples of water are taken from a well bored into a large underground salt (NaCl) deposit. 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 initially at 42 °C. Both samples are allowed to come to room temperature (20. °C) and 1 atm pressure. An NaCl 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 o precipitate will form in Sample #2 Rock candy is formed when excess sugar is dissolved in hot water followed by crystallization. A student wants to make two batches of rock candy. He finds an unopened box of "cane sugar" in the pantry. He starts preparing batch A by dissolving sugar in 500 mL of hot water (70 °C). He keeps adding sugar until no more sugar dissolves in the hot water. He cools the solution to room temperature. He prepares batch B by dissolving sugar in 500 mL of water at room temperature until no more sugar is dissolved. He lets the solution sit at room temperature It is likely that It is likely that less rock candy will be formed in batch A It is likely that no rock candy will be formed in either batch. more rock candy will be formed in batch A. I need more information to predict which batch is more likely to form rock candy o
Predict what will be observed in each experiment below predicted observation (choose one) experiment A pair of 100 mL samples of water are taken from a well bored into a large underground salt (NaCl) deposit. 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 initially at 42 °C. Both samples are allowed to come to room temperature (20. °C) and 1 atm pressure. An NaCl 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 o precipitate will form in Sample #2 Rock candy is formed when excess sugar is dissolved in hot water followed by crystallization. A student wants to make two batches of rock candy. He finds an unopened box of "cane sugar" in the pantry. He starts preparing batch A by dissolving sugar in 500 mL of hot water (70 °C). He keeps adding sugar until no more sugar dissolves in the hot water. He cools the solution to room temperature. He prepares batch B by dissolving sugar in 500 mL of water at room temperature until no more sugar is dissolved. He lets the solution sit at room temperature It is likely that It is likely that less rock candy will be formed in batch A It is likely that no rock candy will be formed in either batch. more rock candy will be formed in batch A. I need more information to predict which batch is more likely to form rock candy o
Hubert KochLv2
7 May 2019