ANALYTICAL CHEMISTRY (LECTURE)

Question 1

usually used to express concentration of commercial aqueous reagents

Answer 1

Weight percent

Question 2

commonly used to specify the concentration of a pure liquid compound diluted with another liquid

Answer 2

Volume percent

Question 3

used to indicate the concentration of solid reagent in a dilute aqueous solution

Answer 3

weight/volume percent

Question 4

commonly used in unit operations to express concentrations of solute present in a stream of gas or liquid

Answer 4

Mole fraction (x)

Question 5

temperature-independent concentration term used conveniently in physiochemical measurements of colligative properties of solutions

Answer 5

molality (m)

Question 6

most commonly used in titration and denotes the amount of solute, in moles, dissolved in a solvent and diluting to a final volume of 1L in a volumetric flask

Answer 6

Molarity (M)

Question 7

concentration term identical to molarity commonly used for solutions of ionic salts that do not exist as a molecule in a solid or in solution

Answer 7

formality (F)

Question 8

once popular unit of concentration still used by some chemists

Answer 8

Normality (N)

Question 9

weight percent formula

Answer 9

%wt/wt = weight of solute/ weight of solution x 100%

Question 10

volume percent formula

Answer 10

%vol/vol = volume of solute/ volume of solution x 100%

Question 11

weight/volume percent formula

Answer 11

%wt/vol = weight of solute (gram)/ volume of solution (mL) X 100%

Question 12

Mole fraction formula

Answer 12

x = moles of solute/ mole of solute + mole of solvent

Question 13

molality formula

Answer 13

m = mole of solute / kg of solvent

Question 14

Molarity formula

Answer 14

M = mole of solute/volume of solution (L)

Question 15

Normality formula

Answer 15

N = Equivalent of solute (eq)/ volume of solution (L)