Poll: Intro to Solutions

a ___________ molecule has partial charges that can attract the full charges on ions

• ionic

• polar

• nonpolar

• radioactive

Water is a _________ molecule

• Polar

• Nonpolar

• Ionic

A solute is a substance that is ___________

• doing the dissolving

• being dissolved

• releasing electrolytes

• absorbing electrolytes

A solvent is a substance that is __________

• doing the dissolving

• being dissolved

• releasing electrolytes

• absorbing electrolytes

Why is table salt not an electrolyte, but aqueous table salt is an electrolyte?

• water turns the salt covalent, and electrolytes must be covalent

• table salt turns the water nonpolar, and electrolytes must be nonpolar

• aqueous table salt is broken apart in to ions, and ions are the electrolytes

• aqueous table salt turns to sugar, and all electrolytes must be sugars

In hydrogen bonds between different water molecules, the _________ charge on oxygen is attracted to the _________ charge on hydrogen in a different water molecule.

• positive, positive

• negative, negative

• positive, negative

• negative, positive

Can aqueous acids and bases also be electrolytes?

• Yes, as long as they dissociate in to ions

• Yes, as long as their molarity is above 1.0

• No, only ionic compounds can be electrolytes

• No, only carbon based covalent compounds can be electrolytes

Can nonpolar molecules, like methane (CH₄) be dissolve in water?

• Yes, they can be dissolved because polar can only dissolve nonpolar

• No, they can not be dissolved because polar can only dissolve polar