PSC 1515 Miami Dade College Chapter 11 Water and Solutions Worksheet

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Qrneevon18

Science

PSC 1515

Miami Dade College

PSC

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PSC1515-2686 (June 2020) Assignment 1 (to turn in by June 23rd) Name: _____________________________________ Textbook: Physical Science, by Bill W. Tillery, 10th Edition. Answer the following questions at your best: Chapter 11 - Water and solutions 12345678910- How is a solution different from other mixtures? Explain why some ionic compounds are soluble while others are insoluble in water. Explain why adding salt to water increases the boiling point. Explain why water has a greater density at 4°C than at 0°C. What is hard water? How is it softened? According to the definition of an acid and the definition of a base, will the pH increase, decrease, or remain the same when NaCl is added to pure water? Explain. What is a hydrogen bond? Explain how a hydrogen bond forms. What feature of a soap molecule gives it cleaning ability? What ion is responsible for a) acidic properties and b) basic properties? Explain why a pH of 7 indicates a neutral solution -why not some other number? Chapter 12: Organic chemistry 1- What is an organic compound? 2- There are millions of organic compounds but only thousands of inorganic compounds. Explain why. 3- What is cracking and re-forming? For what purpose are either or both used by the petroleum industry? 4- Is it possible to have an isomer of ethane? Explain. 5- Suggest a reason that ethylene is an important raw material used in the production of plastics but ethane is not. 6- What are a) natural gas, b) LPG, and c) petroleum ether? 7- What does the octane number of gasoline describe? On what is the number based? 8- Draw a structural formula for alcohol. Describe how alcohols are named. 9- What are fats and oils? What are saturated and unsaturated fats and oils? 10- What is a polymer? Give an example of a naturally occurring plant polymer. Give an example of a synthetic polymer.
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Chapter 11: Water and Solutions
1. How is a solution different from other mixtures?
A solution is a homogenous type of mixture where ions or molecules of two or more
substances become dissolved together. Unlike other mixtures, the two or more substances are
uniformly combined.
2. Explain why some ionic compounds are soluble while others are insoluble in water.
The solubility of an ionic compound in water is determined by the relationship between the
force of hydration and the ion-polar molecule force. When the force of hydration has
occupied most of the polar water molecules, creating a saturation, solubility becomes
difficult because of the less available water molecules that lead to a decreased attraction to
the surface of the solid.
3. Explain why adding salt to water increases the boiling point.
The boiling point of water increases when salt is added to it because, at the same
temperature, the vapor pressure of a solutio...


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