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12 Nov 2019
21. In a water solution, how do acids differ from bases? A) Acids form salts, bust bases do not B) Acids turn litmus blue, while bases turn litmus red. C) Acids form hydrogen ions (H'), while bases form hydroxide ions (OH-) 22. There are 3 things that need to happen before beginning your activity in the Lab, including all of the following EXCEPT.. A) Make sure you have read and understand all the directions carefully. B) Get your lab notebook and prepare the data collection table. C) Prepare a clean work area and assemble safety equipment D) Ask your teacher for permission to start the lab. 23. When table sugar (sucrose, Ci2H22011) dissolves in water, which type(s) of attraction between water and sugar molecules occur(s)? I. hydrogen bonding Il. polar-polar interactions Ill. covalent bonding A) Iand II only B) Il and IlIl only C) D) Iand Ill only I, Il, and IlI 24. Molar freezing point depression constants of three solvents are as follows: acetic acid: K: 3.9 °C/ m ; ethanol: K: 199 °C/ m ; Kf-186ãC/ m; water: If 3 grams of NaCI are dissolved in 30 g of each solvent, which solution has the largest freezing point depression? A) Acetic acid B) Ethanol C) D) Water They are the same 25. What is the molarity of a solution prepared by dissolving 7.31g of Na 50, in enough water to make 225 mL of solution? A) 1.64 M B) 0.136 M C) 0.229 M D) 0.306 M
21. In a water solution, how do acids differ from bases? A) Acids form salts, bust bases do not B) Acids turn litmus blue, while bases turn litmus red. C) Acids form hydrogen ions (H'), while bases form hydroxide ions (OH-) 22. There are 3 things that need to happen before beginning your activity in the Lab, including all of the following EXCEPT.. A) Make sure you have read and understand all the directions carefully. B) Get your lab notebook and prepare the data collection table. C) Prepare a clean work area and assemble safety equipment D) Ask your teacher for permission to start the lab. 23. When table sugar (sucrose, Ci2H22011) dissolves in water, which type(s) of attraction between water and sugar molecules occur(s)? I. hydrogen bonding Il. polar-polar interactions Ill. covalent bonding A) Iand II only B) Il and IlIl only C) D) Iand Ill only I, Il, and IlI 24. Molar freezing point depression constants of three solvents are as follows: acetic acid: K: 3.9 °C/ m ; ethanol: K: 199 °C/ m ; Kf-186ãC/ m; water: If 3 grams of NaCI are dissolved in 30 g of each solvent, which solution has the largest freezing point depression? A) Acetic acid B) Ethanol C) D) Water They are the same 25. What is the molarity of a solution prepared by dissolving 7.31g of Na 50, in enough water to make 225 mL of solution? A) 1.64 M B) 0.136 M C) 0.229 M D) 0.306 M
Hubert KochLv2
21 Oct 2019