Lab E3

Question 1

Most common activity in Analytical Laboratory

Answer 1

Preparation of solution of known concentration

Question 2

Homogenous mixture that contains two or more substances in varying proportions.

Answer 2

Solution

Question 3

Component of the solution being dissolved

Dissolving medium that determines the state of substance.

Answer 3

Solute

Solvent

Question 4

Measure of quantity of solute present in a given quantity of solvent or solution.

Can be extend to gas and solid phase also.

Answer 4

Concentration

Question 5

Concentration of a particular chemical species in solution

Answer 5

Molarity

Question 6

Substance total concentration in solution without regard to its specific chemical form

Answer 6

Formality

Question 7

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

Answer 7

Molecular Weight(MW)

Question 8

_____ used and provides more accurate description for substances that don’t exist as molecules but exist as ionic compounds.

Used for formality

Answer 8

Formula Weight

Question 9

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)

Answer 9

Analytical Concentration

Question 10

Not ionize

Ionic substances

Answer 10

Molar is same as analytical concentration

strong base/strong acid, like HCL = 0

while

H+ and CL- = 0.1

Question 11

When preparation of solution of known concentrations it begins with using either____.

The amount is ______

Answer 11

Solid reagent or concentrated solution

computed first, measured and dissolved in a desired volume

Question 12

Table 3.1: Name the formula in common units of concentration

molarity
formality
weight percent
volume percent
parts per thousand
parts per billion

Question 13

1. 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?
2. Explain what could happen if you add water to a beaker containing concentrated sulfuric acid. Why?