Question

question 15
we make a glass of kool - aid by dissolving some flavored powder into water; this makes kool - aid a solution. in this solution, which part is the solvent and which part is the solute?
flavored powder is the solute , water is the solvent .

question 16
ionic and polar molecules dissolve easily in water, making them select . non - polar molecules do not dissolve in water, making them select .

question 17
nitrogen has an atomic number of seven. it has five electrons in its valence shell. how many electrons does it need to gain to complete its valence shell?
○ 2
○ 3
○ 8
○ 7

Explanation:

Question 15

Step1: Recall solution terms

In a solution, solute is dissolved, solvent does dissolving.

Step2: Apply to Kool - aid

Flavored powder is dissolved (solute), water dissolves it (solvent).

Step1: Recall solubility terms

Polar/ionic dissolve in polar (water) → hydrophilic. Non - polar don't dissolve in water → hydrophobic.

Step2: Assign terms

Ionic and polar molecules: hydrophilic. Non - polar molecules: hydrophobic.

Step1: Recall valence shell rule

Valence shell (for non - transition metals) is complete at 8 electrons (octet rule).

Step2: Calculate electrons needed

Nitrogen has 5 valence electrons. $8 - 5=3$.

Answer:

Flavored powder is the solute, water is the solvent.

Question 16