Water Basics
What property allows water to dissolve many substances?
Polarity
Q: A solution with pH below 7 is called what?
Acid
Q: What tool is used to measure a solution’s pH?
pH paper or litmus paper
Q: Which macromolecule provides quick energy?
Carbohydrates
Q: Bread, pasta, and rice are examples of which macromolecule group?
Carbohydrates
Q: A water molecule has a slightly negative charge near which atom?
Oxygen
Q: A solution with pH above 7 is classified as what?
Base
Q: Lower pH means the solution is...
Stronger acid
Q: Which macromolecule stores genetic information?
Nucleic Acid
Q: Chicken, eggs, and beans are high in which macromolecule?
Proteins
Q: Why is water called the universal solvent?
A: It dissolves more substances than any other liquid.
Q: What is the relationship between pH and pOH?
pH+pOH=X
X=14
Q: If a solution has pH 7, it is classified as what?
Neutral
Q: Which macromolecule builds muscle and enzymes?
Proteins
Q: What macromolecule is found in foods like avocado and butter?
Lipids
Q: How does polarity help water transport nutrients in living organisms?
A: It allows water to attract and carry ions and molecules.
Q: If solution A has pH of 3, what is its pOH?
11
Q: Which chemical has pH 3: Potassium Acid, 3 percent hydrogen peroxide, or boric acid?
Potassium Acid
Q: Which macromolecule includes fats and oils?
Lipids
Q: If you ate eggs and toast for breakfast, list the macromolecule each belongs to.
A: Eggs: protein. Toast: carbohydrate.
Q: Predict one consequence for life on Earth if water were not polar.
A: It would not dissolve key substances, and life processes would not function.
Q: Rank these from strongest acid to strongest base: pH 4, pH 9, pH 3.
A: pH 3 (strongest acid), pH 4, pH 9 (strongest base).
Q: Explain how pH and pOH confirm each other when identifying a solution.
A: Their values add to 14, so one validates if the other matches acid or base strength.
Q: Name one function of lipids besides storing energy.
Insulation
Q: Build a balanced meal that contains at least one carbohydrate, one protein, one lipid, and one nucleic acid source.
A: Example: Rice (carb), chicken (protein), avocado (lipid), fruit or vegetables (nucleic acids).