Bio Lab 2 answers.docx - Exercise 2 answers Activity 1...

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Exercise 2 answers Activity 1 observations: 1 pt sucrose sodium chloride benzoic acid isopropanol Didn’t dissolve Didn’t dissolve Dissolved water Dissolved Dissolved Didn’t dissolve Activity 1 questions: 1. Is sodium chloride an ionic or covalent compound? 1 pt Ionic 2. Is sucrose an ionic or covalent compound? 1 pt Covalent 3. Did benzoic acid dissolve in water? Is it therefore hydrophobic or hydrophilic? 1 pt No. It is hydrophobic. 4. Did benzoic acid dissolve in isopropanol? 1 pt Yes . 5. Based on your answers to questions 3 and 4, is benzoic acid polar or nonpolar? Why? 2 pts Nonpolar. Because it dissolves in isopropanol but not in water. 6. Define the following liquid mixtures as suspensions or solutions: 3 pts a. Water + benzoic acid: suspension b. Water + sodium chloride: solution c. Isopropanol + sucrose: suspension Activity 2 observations: 1 pt pepper pepper + splint pepper + soapy splint isopropanol Pepper sinks Nothing happens Nothing happens water Pepper floats #6: splint stays dry #7: pepper sticks to splint
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