Chemistry Chapter 17
How much heat is absorbed when 6.30 g of water melts?
2.10 kJ
Which symbol is used to connect the formula of the compound with the number of water molecules in a hydrate?
A dot
An emulsifying agent is typically characterized by having ____.
One polar end and one nonpolar end
An electric current can be conducted by _____.
A salt solution
Which of the following materials is NOT a colloid?
Alloy
Which of the following compounds in a non-electrolyte when pure, but an electrolyte when dissolved in water?
Ammonia
Which of the following compounds conducts electricity only in the molten state?
Barium Sulfate
What is the size range of particles in a colloid?
Between 1 nm and 1000 nm
Predict which one of the following compounds would be insoluble in water.
CF4
Which of the following substances dissolves most readily in gasoline?
CH4 (Methane/Farts)
Which of these would you expect to be soluble in the nonpolar solvent carbon disulfide, CS2?
CI4
Which of the following compounds is a non-electrolyte?
Carbon Tetrachloride
An emulsion is which type of mixture?
Colloid
Which compound changes color when it becomes a hydrate?
Copper (II) Sulfate
The solute in a colloidal suspension is called ____.
Dispersed phase
A hydrated crystal that has a water vapor pressure greater than the water vapor pressure of air is called ____.
Efflorescent
What causes water's low vapor pressure?
Hydrogen Bonding
What is primarily responsible for the surface tension of water?
Hydrogen Bonding
Which is responsible for the high thermal energy required to melt ice?
Hydrogen Bonding
The bonds between adjacent water molecules are called ___.
Hydrogen Bonds
Which of the following is primarily responsible for holding water molecules together in the liquid state?
Hydrogen Bonds
A crystal that absorbs water vapor from the air is ___.
Hygroscopic
The fact that ice is less dense than water is related to the fact that _____.
Ice has a molecular structure that is an open framework held together by hydrogen bonds.
Which of the following are weak electrolytes in water?
Ionic compounds that partially dissociate in water
Surface Tension ____.
Is the Inward Force Which Tends to Minimize the Surface Area of a Liquid
How does the surface tension of water compare with the surface tensions of most other liquids?
It is higher.
Which of the following substances is NOT an electrolyte?
LiCl
An emulsion is a colloidal dispersion of a ____.
Liquid in a Liquid
What causes Brownian motion in colloids?
Molecules of the dispersion medium colliding with dispersed phase partices
Which of the following is a weak electrolyte?
NH3
Which of the following substances dissolves most readily in water?
NH3
What type of compound is always an electrolyte?
Nonpolar Covalent
Which of these statements is correct?
Particles can be filtered from a suspension
The bonds between the hydrogen and oxygen atoms in a water molecule are ____.
Polar Covalent Bonds
Which of the following is a strong electrolyte?
Potassium Sulfate
Which of the following substances is the most soluble in water?
Sodium Chloride
Which of the following compounds is an electrolyte?
Sodium Hydroxide
What is the term for the dissolving medium in a solution?
Solvent
What occurs in solvation?
Solvent molecules surround solute ions
Which of the following is NOT a common hydrate?
Sugar
Which of the following mixtures is NOT a colloid?
Sugar Water
Which of the following is NOT a result of surface tension in water?
Surface Area is Maximized
Which of the following mixture types is characterized by the settling of particles?
Suspension
Which of the following types of mixtures exhibit the Tyndall effect?
Suspensions and Colloids
Which of the following mixture types can be filtered to remove solute?
Suspensions only
What is the shape of a water molecule?
Tetrahedral
A solution is a mixture ____.
That has the same properties throughout.
Which atom in a water molecule has the greatest electronegativity?
The Oxygen Atom
A solution has which of the following properties?
The average diameter of its solute particles usually is less than 1 nm.
Why are two nonpolar substances able to dissolve in each other?
They have similar attractive forces in their molecules.
What is another term for the water of hydration?
Water of crystallization
