Unit 2

Question 1

Most commonly used glassware for heating and sterilization purposes. Characterized by a high degree of thermal resistance. Has a strain point of 515°C.

Answer 1

Borosilicate Glass

Question 2

Examples of Borosilicate glass

Answer 2

Pyrex and Kimex

Question 3

Chemical responsible for the high thermal resistance of borosilicate glass

Answer 3

Boron trioxide

Question 4

Special alumina-silicate glass, strengthened chemically than thermally, 6x stronger than borosilicate,. It is also radiation resistant

Answer 4

Aluminosilicate Glass

Question 5

Example of aluminosilicate glass

Answer 5

Corex

Question 6

Used in optical instruments, very clear, made of pure silica

Answer 6

High Silica

Question 7

Acid and alkali resistant, for high thermal, drasticheat shock, and extreme chemical treatment with acids (except hydrofluoric) and dilute alkali. Can be heated to 900°C

Answer 7

Vycor

Question 8

Vycor can be heated to what temperature?

Answer 8

900°C

Question 9

Protect material sensitive to light, amber colored.

Answer 9

Low actinic

Question 10

Made up of soda-lime glass and a mixture of calcium, silicon, and sodium oxides.

Answer 10

Flint glass

Question 11

Used to make disposable glassware, has poor thermal resistance, and is easy to melt

Answer 11

Flint glass