1. Week 14 1. A student made a solution by dissolving sugar in tap water
Week A student made a solution by dissolving sugar in tap water. She wanted to increase the concentration of her sugar solution. Select the best way for her to do that.
Add more sugar to the existing solution
Add more water to the existing solution
Warm the solution
Agitate the solution
2. Carbon dioxide in the atmosphere reacts with rainwater to form carbonic acid. The pH of this rainwater is
Less than 7. 7.
Greater than 7.
Not measurable by ordinary means.

2. 3. Which of the following substances is acidic?
Liquid soap C. Baking soda
Vinegar D. Flour
4. The picture below shows a carbonated beverage. Which term describes the CO2 gas?
Ion
Element
Solute
Solvent