Exp 1: Common Lab Operations

Combustion is commonly called ____

The substance that burns is usually referred to as _____

Complete combustion of a fuel yields _____

_______ occurs when the supply of air or oxygen is poor.

where the fuel and air mixes

entrance of the air

regulates/controls the amount of fuel gas to be combusted

regulates/controls the amount of air coming in and to close and open the air holes

entrance of the fuel gas

supports the Bunsen burner

valve that controls the fuel gas coming in to the gas spud

place of ignition

Name that part: a

Name that part: b

Name that part: c

Name that part: d

Name that part: e

Name that part: f

Name that part: g

Name that part: h

1. Half close air holes.

2. Open the gas regulator slightly and connect the Bunsen burner to the gas cock using rubbing tubing

3. Light a matchstick, hold it above the mouth of the Bunsen burner.

4. Open the gas cock slowly.

Non luminous color of flame, complete combustion

Luminous color of flame, incomplete combustion

the kind of flame used in the experiment...

Luminous flame produces black substance...

Outer region of non luminous flame

Intermediate/ Hottest Region of non luminous flame

Inner/ Coolest region of non luminous flame

curve line present in a liquid inside the container

Types of meniscus:

kind of liquids, eye must be level at the lower meniscus

kind of liquids, eye must be level at the upper meniscus

1. Fill the test tube with not more than ¾ of liquid.

2. Hold test tube with test tube holder

3. Incline test tube at about 45 0 angle with the flame

4. Subject the flame at the middle of the test tube near the top of the liquid

5. Move the test tube back and forth

6. When the liquid starts to boil, remove the test tube from the flame

When smelling any chemical or substance, do so by ________ it towards you. Don't sniff it from the container.

it is a separation of each components/substances in a given mixtures

kinds of physical processes

What substance is clinging at the bottom of the watch glass

What is the term given to the clear liquid and the solid left at the container? it contains salt, water, coloring

the clear liquid that pass through the filter paper is called

What is the term given to the solid left after evaporation?

Give the chemical name of the white residue/solid.