Solutions

Why can water have no net charge but have slight charges in different parts of the molecule?

• The oxygen end is slightly negative and the hydrogen end is slightly positive
• The hydrogen end is slightly negative and the oxygen end is slightly positive
• The hydrogen and oxygen ends change in polarity
• Because it is hydrophobic

Tags

NGSS.MS-PS1-1

Based on the solubility rules, CaCO₃ will be the 

• soluble precipitate

• soluble aqueous solution    

• insoluble aqueous solution

• insoluble precipitate

The chemical compound of water is

• HO
• H₂O
• H₃O
• HO₂

Tags

NGSS.HS-ESS2-5

tendency of molecules of the same kind to stick to one another

• cohesion
• adhesion
• solution
• polar molecule

Saltwater is a __________mixture that conducts electricity due to dissolved ions. We would classify saltwater as an __________.

• homogeneous, electrolyte

• heterogeneous, nonelectrolyte

• heterogeneous, electrolyte

• homogeneous, nonelectrolyte

Tags

NGSS.HS-PS1-3

What affects the rate at which a gas dissolves but has no affect on a solid?

• temperature

• increasing pressure

• stirring

• increase surface area

What is the most common solvent in everyday life?

• Ethanol
• Tuluene
• Water
• Oils

Tags

NGSS.HS-ESS2-5

A dissolved solute that does not form ions is

(usually a covalent compound)

• a nonelectrolyte.

• a weak electrolyte.

• a strong electrolyte.

• insoluble.

When no more sugar will dissolve in a glass of water, the solution is...

• unsaturated
• saturated
• supersaturated

Tags

NGSS.MS-PS1-2

How does a solution become supersaturated?

• dissolve lots of solute in it.
• dissolve a little solute in it. 
• dissolve more solute than you should be able to. 
• dissolve a super amount of solvent in it. 

Tags

NGSS.HS-PS1-5