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Usage, Management and Handling of Apparatus and Materials

1.3 Usage, Management and Handling of Apparatus and Materials
CHEMISTRY • Form 4 • Chapter 1: Introduction to Chemistry

1.3Usage, Management and Handling of Apparatus and Materials

The chemistry laboratory is an essential place for learning and conducting scientific investigations, but it can also be hazardous. To prevent accidents and injuries, students must strictly observe laboratory safety rules, correctly use personal protective equipment, operate safety apparatus, store and dispose of various categories of chemicals properly, and know how to respond during emergency situations such as chemical and mercury spills.

Learning Objectives

  • Explain the types and functions of personal protective equipment and safety equipment in the laboratory.
  • Demonstrate methods of managing and handling apparatus and materials, including the storage and disposal of chemicals.
  • Communicate about emergency management procedures in the laboratory, specifically for chemical spills and mercury spills.

Laboratory Safety, Storage, and Emergency Procedures

Classify chemical storage and disposal correctly, then follow the emergency steps for spills at a glance.

Storage Categories

  • Reactive metals — paraffin oil
  • Volatile / inflammable liquids — shady area, away from heat
  • Light-sensitive substances — dark bottles
  • Corrosive chemicals — locked special cabinets
  • Heavy metals / toxic substances — labelled containers in a locked, heat-free room

Disposal Categories

  • Hydrogen peroxide — dilute and add sodium sulphite before pouring
  • Solid wastes — special containers
  • Organic solvents — labelled glass or plastic containers
  • Strong acids / alkalis — closed, labelled containers
  • Heavy metals — evaporate in fume chamber, then waste container

Chemical Spill Steps

  1. Inform teacher or lab assistant.
  2. Prohibit others from entering.
  3. Border the spill with sand.
  4. Clean the spill.
  5. Dispose of it correctly.

Mercury Spill Steps

  1. Inform teacher or lab assistant.
  2. Make the site a prohibited area.
  3. Sprinkle sulphur powder over the spill.
  4. Contact the Fire and Rescue Department.

Brief Explanation

Personal protection, safety equipment, storage, disposal and emergency response.

Personal Protective Equipment (PPE) shields the body from direct contact, while safety installations such as the fume chamber, safety shower, eyewash and fire extinguisher manage larger hazards.

Personal Protective Equipment

  • Safety goggles — prevent dust or chemical splashes from entering the eyes.
  • Face mask — protect respiratory organs from powder or fumes.
  • Gloves — protect hands from injuries, chemicals or infections.
  • Laboratory coat — protect body and clothing against chemical spills.
  • Laboratory shoes — protect feet from chemical spills, sharp objects or toxic substances.

Laboratory Safety Equipment

  • Fume chamber — for experiments releasing toxic vapours, combustion or pungent smells.
  • Safety shower — wash the body during a chemical accident and extinguish clothing fires.
  • Eyewash — wash and clean the eyes after an accident.
  • Fire extinguisher — extinguish fire in the laboratory.
  • Hand wash — remove chemicals, oil, dirt and microorganisms from hands.
Chemical category Storage method
Reactive metals such as lithium, sodium and potassium Stored in paraffin oil to prevent reaction with moisture in the air.
Hydrocarbons and organic solvents Stored in shady areas far from sunlight and heat sources.
Substances that decompose easily in light Stored in dark bottles, e.g. concentrated nitric acid, hydrogen peroxide solution, silver nitrate solution, liquid bromine, liquid chlorine.
Substances with pH < 5 and pH > 9 Stored in special locked storage cabinets.
Heavy metals and toxic substances Kept in special labelled containers and stored in a locked room that is heat-free.
Chemical waste Disposal method
Low-concentration hydrogen peroxide Can be poured directly into the sink.
High-concentration hydrogen peroxide Dilute with water and add sodium sulphite for decomposition before pouring into the sink.
Solid wastes such as glass and rubber Dispose into special containers.
Organic solvents and hydrocarbons Keep in special containers made of glass or plastic; never pour into sink or drain.
Substances with pH < 5 and pH > 9 Keep in closed, labelled containers during disposal.
Heavy metals and toxic substances Keep solutions in plastic bags, evaporate in the fume chamber, then place tied residue bags into a heavy metal waste container.
Volatile substances Store in closed containers away from sun and heat to prevent fatal inhalation risks.
Chemical Safety Data Sheet (CSDS) provides complete information on chemical poisoning, management and storage methods, and emergency handling procedures.

Try These Questions First

Answer mentally, then check the explanation.

1

Why must reactive metals such as sodium and potassium be stored in paraffin oil?

Answer: To prevent them from reacting with the moisture in the air.
2

What is the function of a fume chamber in the chemistry laboratory?

Answer: It is a specially designed equipment used to carry out experiments that release toxic vapours, cause combustion, or produce pungent smells.
3

What substance should be sprinkled over a mercury spill before contacting the Fire and Rescue Department?

Answer: Sulphur powder.

Common Mistakes

Avoid these errors when handling chemicals and responding to spills.

!
Pouring organic solvents or concentrated acids directly into the laboratory sink instead of collecting them in designated labelled containers.
!
Disposing of high-concentration hydrogen peroxide directly into the sink without first diluting it with water and adding sodium sulphite for decomposition.
!
Touching mercury droplets directly or sweeping them up with a broom instead of sprinkling sulphur powder over the spill and reporting it immediately.
!
Confusing personal protective equipment (worn on the body, like goggles and lab coat) with laboratory safety equipment (installations in the room, like eyewash and fume chamber).

Common Misconceptions

Compare each misconception with the correct fact.

Misconception

All chemical wastes can be washed away with excess water down the laboratory drain.

Correct Fact

Many chemicals are toxic, carcinogenic, volatile, or highly corrosive (pH < 5 or pH > 9). Pouring them into sinks can release toxic fumes, damage plumbing, and pollute water supplies.

Misconception

Broken glass and damaged rubber tubing can be thrown into general classroom trash bins.

Correct Fact

Solid wastes such as glass and rubber must be disposed of into special dedicated containers to prevent injuries to users and waste handlers.

Misconception

Mercury poisoning only happens if you swallow mercury.

Correct Fact

Mercury is volatile at room temperature and produces toxic vapour that can be inhaled; it can also be absorbed directly into the body through the skin.

Summary

Key facts to remember.

  • Wear personal protective equipment: safety goggles, face mask, gloves, laboratory coat and laboratory shoes.
  • Use laboratory safety fixtures: fume chamber, safety shower, eyewash, fire extinguisher and hand wash.
  • Follow specific chemical storage protocols: reactive metals in paraffin oil, light-sensitive chemicals in dark bottles, corrosive chemicals in locked cabinets.
  • Practise correct disposal: neutralise or dilute high-concentration hydrogen peroxide, evaporate heavy metals in fume chambers, and segregate organic solvents and solid wastes.
  • Execute immediate emergency response for chemical spills (isolate area, border with sand, clean, dispose) and mercury spills (isolate, cover with sulphur powder, call Fire and Rescue Department).

Quick Activity

Complete all parts before checking your score.

A. Objective Quiz

1

Which chemical must be stored in a dark bottle to prevent decomposition in the presence of light?

2

What should be used to border a general chemical spill to stop it from spreading to other areas?

B. Fill in the Blanks

3

Highly reactive metals such as lithium, sodium, and potassium must be stored in _____ to prevent them from reacting with moisture in the air.

4

Before pouring high-concentration hydrogen peroxide waste into the sink, it must be diluted with water and added with _____ to allow decomposition to occur.

C. Match the Safety Equipment with Its Function

Drag each equipment on desktop. On mobile, tap an equipment and then tap the matching box.

Equipment

Fume chamber Safety shower Eyewash Fire extinguisher

Function

1Used to carry out experiments that release toxic vapours or pungent smells
2Used to wash the body during a chemical accident and extinguish fire on clothing
3Used for washing and cleaning the eye when chemical accidents occur on parts of the eye
4Used for extinguishing fire in the laboratory
Complete every answer before checking.
 

Keywords

Tap or hover over a term to read its meaning.

Personal Protective Equipment (PPE) Fume chamber Safety shower Eyewash Chemical Safety Data Sheet (CSDS) Paraffin oil Decomposition Mercury spill Sulphur powder Listed waste
The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of Pandai.

Usage, Management and Handling of Apparatus and Materials

1.3 Usage, Management and Handling of Apparatus and Materials
CHEMISTRY • Form 4 • Chapter 1: Introduction to Chemistry

1.3Usage, Management and Handling of Apparatus and Materials

The chemistry laboratory is an essential place for learning and conducting scientific investigations, but it can also be hazardous. To prevent accidents and injuries, students must strictly observe laboratory safety rules, correctly use personal protective equipment, operate safety apparatus, store and dispose of various categories of chemicals properly, and know how to respond during emergency situations such as chemical and mercury spills.

Learning Objectives

  • Explain the types and functions of personal protective equipment and safety equipment in the laboratory.
  • Demonstrate methods of managing and handling apparatus and materials, including the storage and disposal of chemicals.
  • Communicate about emergency management procedures in the laboratory, specifically for chemical spills and mercury spills.

Laboratory Safety, Storage, and Emergency Procedures

Classify chemical storage and disposal correctly, then follow the emergency steps for spills at a glance.

Storage Categories

  • Reactive metals — paraffin oil
  • Volatile / inflammable liquids — shady area, away from heat
  • Light-sensitive substances — dark bottles
  • Corrosive chemicals — locked special cabinets
  • Heavy metals / toxic substances — labelled containers in a locked, heat-free room

Disposal Categories

  • Hydrogen peroxide — dilute and add sodium sulphite before pouring
  • Solid wastes — special containers
  • Organic solvents — labelled glass or plastic containers
  • Strong acids / alkalis — closed, labelled containers
  • Heavy metals — evaporate in fume chamber, then waste container

Chemical Spill Steps

  1. Inform teacher or lab assistant.
  2. Prohibit others from entering.
  3. Border the spill with sand.
  4. Clean the spill.
  5. Dispose of it correctly.

Mercury Spill Steps

  1. Inform teacher or lab assistant.
  2. Make the site a prohibited area.
  3. Sprinkle sulphur powder over the spill.
  4. Contact the Fire and Rescue Department.

Brief Explanation

Personal protection, safety equipment, storage, disposal and emergency response.

Personal Protective Equipment (PPE) shields the body from direct contact, while safety installations such as the fume chamber, safety shower, eyewash and fire extinguisher manage larger hazards.

Personal Protective Equipment

  • Safety goggles — prevent dust or chemical splashes from entering the eyes.
  • Face mask — protect respiratory organs from powder or fumes.
  • Gloves — protect hands from injuries, chemicals or infections.
  • Laboratory coat — protect body and clothing against chemical spills.
  • Laboratory shoes — protect feet from chemical spills, sharp objects or toxic substances.

Laboratory Safety Equipment

  • Fume chamber — for experiments releasing toxic vapours, combustion or pungent smells.
  • Safety shower — wash the body during a chemical accident and extinguish clothing fires.
  • Eyewash — wash and clean the eyes after an accident.
  • Fire extinguisher — extinguish fire in the laboratory.
  • Hand wash — remove chemicals, oil, dirt and microorganisms from hands.
Chemical category Storage method
Reactive metals such as lithium, sodium and potassium Stored in paraffin oil to prevent reaction with moisture in the air.
Hydrocarbons and organic solvents Stored in shady areas far from sunlight and heat sources.
Substances that decompose easily in light Stored in dark bottles, e.g. concentrated nitric acid, hydrogen peroxide solution, silver nitrate solution, liquid bromine, liquid chlorine.
Substances with pH < 5 and pH > 9 Stored in special locked storage cabinets.
Heavy metals and toxic substances Kept in special labelled containers and stored in a locked room that is heat-free.
Chemical waste Disposal method
Low-concentration hydrogen peroxide Can be poured directly into the sink.
High-concentration hydrogen peroxide Dilute with water and add sodium sulphite for decomposition before pouring into the sink.
Solid wastes such as glass and rubber Dispose into special containers.
Organic solvents and hydrocarbons Keep in special containers made of glass or plastic; never pour into sink or drain.
Substances with pH < 5 and pH > 9 Keep in closed, labelled containers during disposal.
Heavy metals and toxic substances Keep solutions in plastic bags, evaporate in the fume chamber, then place tied residue bags into a heavy metal waste container.
Volatile substances Store in closed containers away from sun and heat to prevent fatal inhalation risks.
Chemical Safety Data Sheet (CSDS) provides complete information on chemical poisoning, management and storage methods, and emergency handling procedures.

Try These Questions First

Answer mentally, then check the explanation.

1

Why must reactive metals such as sodium and potassium be stored in paraffin oil?

Answer: To prevent them from reacting with the moisture in the air.
2

What is the function of a fume chamber in the chemistry laboratory?

Answer: It is a specially designed equipment used to carry out experiments that release toxic vapours, cause combustion, or produce pungent smells.
3

What substance should be sprinkled over a mercury spill before contacting the Fire and Rescue Department?

Answer: Sulphur powder.

Common Mistakes

Avoid these errors when handling chemicals and responding to spills.

!
Pouring organic solvents or concentrated acids directly into the laboratory sink instead of collecting them in designated labelled containers.
!
Disposing of high-concentration hydrogen peroxide directly into the sink without first diluting it with water and adding sodium sulphite for decomposition.
!
Touching mercury droplets directly or sweeping them up with a broom instead of sprinkling sulphur powder over the spill and reporting it immediately.
!
Confusing personal protective equipment (worn on the body, like goggles and lab coat) with laboratory safety equipment (installations in the room, like eyewash and fume chamber).

Common Misconceptions

Compare each misconception with the correct fact.

Misconception

All chemical wastes can be washed away with excess water down the laboratory drain.

Correct Fact

Many chemicals are toxic, carcinogenic, volatile, or highly corrosive (pH < 5 or pH > 9). Pouring them into sinks can release toxic fumes, damage plumbing, and pollute water supplies.

Misconception

Broken glass and damaged rubber tubing can be thrown into general classroom trash bins.

Correct Fact

Solid wastes such as glass and rubber must be disposed of into special dedicated containers to prevent injuries to users and waste handlers.

Misconception

Mercury poisoning only happens if you swallow mercury.

Correct Fact

Mercury is volatile at room temperature and produces toxic vapour that can be inhaled; it can also be absorbed directly into the body through the skin.

Summary

Key facts to remember.

  • Wear personal protective equipment: safety goggles, face mask, gloves, laboratory coat and laboratory shoes.
  • Use laboratory safety fixtures: fume chamber, safety shower, eyewash, fire extinguisher and hand wash.
  • Follow specific chemical storage protocols: reactive metals in paraffin oil, light-sensitive chemicals in dark bottles, corrosive chemicals in locked cabinets.
  • Practise correct disposal: neutralise or dilute high-concentration hydrogen peroxide, evaporate heavy metals in fume chambers, and segregate organic solvents and solid wastes.
  • Execute immediate emergency response for chemical spills (isolate area, border with sand, clean, dispose) and mercury spills (isolate, cover with sulphur powder, call Fire and Rescue Department).

Quick Activity

Complete all parts before checking your score.

A. Objective Quiz

1

Which chemical must be stored in a dark bottle to prevent decomposition in the presence of light?

2

What should be used to border a general chemical spill to stop it from spreading to other areas?

B. Fill in the Blanks

3

Highly reactive metals such as lithium, sodium, and potassium must be stored in _____ to prevent them from reacting with moisture in the air.

4

Before pouring high-concentration hydrogen peroxide waste into the sink, it must be diluted with water and added with _____ to allow decomposition to occur.

C. Match the Safety Equipment with Its Function

Drag each equipment on desktop. On mobile, tap an equipment and then tap the matching box.

Equipment

Fume chamber Safety shower Eyewash Fire extinguisher

Function

1Used to carry out experiments that release toxic vapours or pungent smells
2Used to wash the body during a chemical accident and extinguish fire on clothing
3Used for washing and cleaning the eye when chemical accidents occur on parts of the eye
4Used for extinguishing fire in the laboratory
Complete every answer before checking.
 

Keywords

Tap or hover over a term to read its meaning.

Personal Protective Equipment (PPE) Fume chamber Safety shower Eyewash Chemical Safety Data Sheet (CSDS) Paraffin oil Decomposition Mercury spill Sulphur powder Listed waste
The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of Pandai.
Chapter : Introduction to Chemistry
Topic : Uses, Management and Handling of Apparatus and Materials
Form 4 Chemistry
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