1. Bell Ringer 2 4 questions Jan 24/25

2. Question 1 Over time an open soft drink will lose carbonation (dissolved CO2). Which of these allows the CO2 to remain in solution the longest? Over time an open soft drink will lose carbonation (dissolved CO2). Which of these allows the CO2 to remain in solution the longest? A Reduced air pressure A Reduced air pressure B Exposure to direct sunlight B Exposure to direct sunlight C Increased air currents C Increased air currents D Cooler temperatures D Cooler temperatures

3. Question 2 Power plants that discharge warm water into rivers have a negative effect on aquatic life. This is because the higher water temperature — Power plants that discharge warm water into rivers have a negative effect on aquatic life. This is because the higher water temperature — A increases the pressure of the river water A increases the pressure of the river water B increases the pH value of the river water B increases the pH value of the river water C decreases sediment solubility in the river water C decreases sediment solubility in the river water D decreases the dissolved oxygen in the river water D decreases the dissolved oxygen in the river water

4. Question 3 A recipe calls for 210 grams of sugar to be dissolved in 0.25 liter of water. After the mixture is stirred, some sugar crystals remain in the water. What can be added to the mixture to help dissolve the remaining sugar crystals? A recipe calls for 210 grams of sugar to be dissolved in 0.25 liter of water. After the mixture is stirred, some sugar crystals remain in the water. What can be added to the mixture to help dissolve the remaining sugar crystals? A Thermal energy A Thermal energy B 2.0 g of baking soda B 2.0 g of baking soda C Ice cubes C Ice cubes D 2.0 g of sodium chloride D 2.0 g of sodium chloride

5. Question 4 All of these can affect the rate at which a solid dissolves in water except — All of these can affect the rate at which a solid dissolves in water except — A decreasing air pressure A decreasing air pressure B stirring the water B stirring the water C increasing the temperature of the water C increasing the temperature of the water D using larger crystals of the solid D using larger crystals of the solid