Lab E3 Flashcards
Most common activity in Analytical Laboratory
Preparation of solution of known concentration
Homogenous mixture that contains two or more substances in varying proportions.
Solution
Component of the solution being dissolved
Dissolving medium that determines the state of substance.
Solute
Solvent
Measure of quantity of solute present in a given quantity of solvent or solution.
Can be extend to gas and solid phase also.
Concentration
Concentration of a particular chemical species in solution
Molarity
Substance total concentration in solution without regard to its specific chemical form
Formality
When converting the mole of a solute to the mass unit, ____ used as a conversion factor.
Refers to the sum of atomic weights of atom that makeup a compound
Used for molarity
Molecular Weight(MW)
_____ used and provides more accurate description for substances that don’t exist as molecules but exist as ionic compounds.
Used for formality
Formula Weight
Gives the total number of moles of a solute in one liter of the solution.
Gives recipe by which the solution can be prepared regardless of what might happen to the solute during the concentration process.
Different from molar equilibrium concentrations or just molar concentrations (M)
Analytical Concentration
Not ionize
Ionic substances
Molar is same as analytical concentration
strong base/strong acid, like HCL = 0
while
H+ and CL- = 0.1
When preparation of solution of known concentrations it begins with using either____.
The amount is ______
Solid reagent or concentrated solution
computed first, measured and dissolved in a desired volume
Table 3.1: Name the formula in common units of concentration
molarity
formality
weight percent
volume percent
parts per thousand
parts per billion
- Acid are always stored in glass containers but bases like NaOH solution should be stored in plastic container and not in a glass bottle. Why?
- Explain what could happen if you add water to a beaker containing concentrated sulfuric acid. Why?
