1. When a sugar cube is added to water, it dissolves. This occurs because the sugar molecules are small and can move between the water molecules. in constant random motion and separate from each other. more attracted to each other than to water. breaking apart into smaller molecules. 2. I. temperature II. pressure III. surface area The process of a solid dissolving into a liquid is affected by I and II. II and III. I and III. I, II, and III. 3. Many common drinks are weakly acidic. What is the typical of a weak acid solution? bitter salty sour sweet 4. Mr. Smith lists five household items and asks his students to classify them into acidic, basic, and neutral substances. The table below shows the classification of the items made by four of his students. Which student correctly classifies the items? Dick Janet Joe Mary 5. The rate at which a solid dissolves in a liquid can be increased by increasing the temperature, by increasing the speed of stirring, or by decreasing the particle size of the solid. How do ALL THREE of these changes act to increase the rate of solution? They all decrease the size of the solute molecules. They all increase the velocity of the solvent molecules. They all increase the rate at which solvent molecules come in contact with solute molecules. They all reduce the activation energy needed to make the solution process proceed beyond a high-energy barrier.
1. When a sugar cube is added to water, it dissolves. This occurs because the sugar molecules are small and can move between the water molecules. in constant random motion and separate from each other. more attracted to each other than to water. breaking apart into smaller molecules. 2. I. temperature II. pressure III. surface area The process of a solid dissolving into a liquid is affected by I and II. II and III. I and III. I, II, and III. 3. Many common drinks are weakly acidic. What is the typical of a weak acid solution? bitter salty sour sweet 4. Mr. Smith lists five household items and asks his students to classify them into acidic, basic, and neutral substances. The table below shows the classification of the items made by four of his students. Which student correctly classifies the items? Dick Janet Joe Mary 5. The rate at which a solid dissolves in a liquid can be increased by increasing the temperature, by increasing the speed of stirring, or by decreasing the particle size of the solid. How do ALL THREE of these changes act to increase the rate of solution? They all decrease the size of the solute molecules. They all increase the velocity of the solvent molecules. They all increase the rate at which solvent molecules come in contact with solute molecules. They all reduce the activation energy needed to make the solution process proceed beyond a high-energy barrier.