Unit 6 - Solutions

The picture to the right illustrates a solute molecule surrounded by a hydration shell of water molecules. Based on your knowledge of the polarity of water molecules, the solute is most likely...

• Positively charged

• Negatively charged

• Nonpolar

• Not enough information to tell

Consider the following list of mixtures I-IV. Based on the information given, which mixtures are miscible when Pure Substance 1 is combined with Pure Substance 2?

• Mixtures I and II

• Mixtures I and III

• Mixtures II and III

• Mixtures II and IV

Tags

NGSS.MS-PS1-2

Which of the following factors will NOT increase the rate of dissolution of a solute?

• Crushing a solid into smaller pieces

• Placing the beaker on a hot plate

• Adding more solvent to the beaker

• Stirring the contents of the beaker after the solute is added

What is the molarity of a 0.30 liter solution containing 0.50 moles of H2SO4?

• 1.7 M

• 0.6 M

• 0.8 M

• 0.15 M

A mass vs volume graph of different solutions is included below. Water is labeled as a reference point. Based on the graph, which solution has the lowest density?

• E

• F

• G

• H

Tags

NGSS.MS-PS1-2

Use the leaf pigment chromatogram to answer the next two questions. Which plant species has a mixture of plant pigments most similar to species W?

• Species X

• Species Y

• Species Z

• None of the species are similar.

Tags

NGSS.MS-LS3-1

NGSS.MS-LS4-4

Assuming all pigments have the same solubility, which color pigment has the largest molar mass?

• Yellow

• Orange

• Green

• Purple

Tags

NGSS.MS-PS1-1

Which of the following solutions would be the correct dissolution equation for Fe2(SO4)3?

• Fe2(SO4)3 (aq) → 2 Fe3+ (s) + 3 SO4 2- (s)

• Fe2(SO4)3 (s) → Fe2(SO4)3 (aq)

• Fe2(SO4)3 (s) → 2 Fe3+ (aq) + 3 SO4 2- (aq)

• Fe2(SO4)3 (s) → Fe2+ (aq) + SO4 3- (aq)

Tags

NGSS.MS-PS1-1

Which of the following will increase the concentration of an aqueous solution?

• Adding solute to the solution

• Adding solvent to the solution

• Removing solvent from the solution

• Removing solute from the solution

A solution was created by adding 100 g of potassium nitrate (KNO3) to 100 g of water (H2O) that is 50°C. The solute was crushed before mixing and was fully stirred for 2 minutes. No other additional steps were taken. It can be assumed that the solute fully behaved and dissolved as expected and dictated by the solubility curve given below. Which of the following correctly describes the observations of the chemist and the resulting solution?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4