Terms & Definitions Lab 6

Question 1

PERCENTAGE RECOVERY. What is this calculation mainly used for?

Answer 1

The final weight of a substance divided by the original weight of the same substance multiplied by 100. Often used during recrystallization.

Question 2

PERCENTAGE YIELD

Answer 2

The acutal yield of a substance divided by the theoretical yield and multiplied by 100 (to express it as a percentage).

Question 3

SCHLIERIEN LINES. What does it indicate?

Answer 3

Streaks or wavy lines in a solution indicating regions of different densities; (usually indicates that something is dissolving)

Question 4

SOLVENT PAIR. How do we prepare a solvent pair?

Answer 4

Two or more miscible solvents, which when added together form a mixture having the appropriate properties for recrystallization. Once solvent usually dissolved the compound very well while the other solvent dissolves the comound pooryly or not at all.

Question 5

YIELD

Answer 5

The weight of the substance that has been produced.