CHEM 134 Midterm, Gases, Solutions,
and Reaction Calculations Review
What effect does temperature have on the solubility of liquids and gases in water? -
Answer Temperature generally increases the solubility of liquids and gases in water.
What are the purposes of subscripts, superscripts, and coefficients in chemical
equations? - answer Subscripts indicate the number of atoms in a molecule,
superscripts indicate charge, and coefficients indicate the number of molecules or
moles.
How do saturated, unsaturated, and supersaturated solutions differ? - answerSaturated
solutions contain the maximum amount of solute, unsaturated solutions can dissolve
more solute, and supersaturated solutions contain more solute than can normally be
dissolved at that temperature.
What is the behavior of ionic vs. molecular compounds when dissolved in water? -
answerIonic compounds dissociate into ions, while molecular compounds generally do
not dissociate.
How can you identify reactants and products in a chemical reaction? - answerReactants
are substances that undergo change, while products are the substances formed as a
result of the reaction.
When should Avogadro's number be used in calculations? - answerAvogadro's number
(6.022 x 10²³) is used to convert between moles and number of particles.
What are the steps for making a solution starting with a solid compound? - answer1.
Measure the solid compound. 2. Add it to a volumetric flask. 3. Add solvent to the
desired volume.
What are the steps for diluting a solution? - answer1. Measure the concentrated
solution. 2. Add it to a volumetric flask. 3. Add solvent to the desired volume.
What is the definition of standard temperature and pressure (STP)? - answerSTP is
defined as 1 atm pressure and 0°C temperature.
What is the molar volume of a gas at STP? - answerThe molar volume of a gas at STP
is 22.4 L/mol.
What are the symbols for the first 7 diatomic gases? - answerN₂, O₂, H₂, F₂, Cl₂, Br₂, I₂.
and Reaction Calculations Review
What effect does temperature have on the solubility of liquids and gases in water? -
Answer Temperature generally increases the solubility of liquids and gases in water.
What are the purposes of subscripts, superscripts, and coefficients in chemical
equations? - answer Subscripts indicate the number of atoms in a molecule,
superscripts indicate charge, and coefficients indicate the number of molecules or
moles.
How do saturated, unsaturated, and supersaturated solutions differ? - answerSaturated
solutions contain the maximum amount of solute, unsaturated solutions can dissolve
more solute, and supersaturated solutions contain more solute than can normally be
dissolved at that temperature.
What is the behavior of ionic vs. molecular compounds when dissolved in water? -
answerIonic compounds dissociate into ions, while molecular compounds generally do
not dissociate.
How can you identify reactants and products in a chemical reaction? - answerReactants
are substances that undergo change, while products are the substances formed as a
result of the reaction.
When should Avogadro's number be used in calculations? - answerAvogadro's number
(6.022 x 10²³) is used to convert between moles and number of particles.
What are the steps for making a solution starting with a solid compound? - answer1.
Measure the solid compound. 2. Add it to a volumetric flask. 3. Add solvent to the
desired volume.
What are the steps for diluting a solution? - answer1. Measure the concentrated
solution. 2. Add it to a volumetric flask. 3. Add solvent to the desired volume.
What is the definition of standard temperature and pressure (STP)? - answerSTP is
defined as 1 atm pressure and 0°C temperature.
What is the molar volume of a gas at STP? - answerThe molar volume of a gas at STP
is 22.4 L/mol.
What are the symbols for the first 7 diatomic gases? - answerN₂, O₂, H₂, F₂, Cl₂, Br₂, I₂.
