Specifications

Component List

All components listed below are included in this kit. Items marked Optional can be customized.

Available Joint Sizes · GB/ISO/ASTM Standards

All sizes share 1:10 standard taper — GB, ISO, and ASTM sizes are interchangeable

14/19 19/26 24/29 (GB·recommended) 29/32 34/35 · 45/40 · 50/42 custom

GB (Chinese) 14/19 · 19/26 · 24/29 · 29/32 ISO 14/19 · 19/26 · 24/29 · 29/32 ASTM (American) 14/20 · 19/22 · 24/40 · 29/42

* All components have matching joint sizes for full system compatibility. ASTM and GB/ISO sizes share 1:10 taper — seal lengths differ but are interchangeable.

Component	Standard Spec	Available Joint Sizes	Upgrade Options	Qty	Link
Please contact us to confirm the available specifications.

📌 Customization Notes:
• Joint size can be selected to match your existing lab system:
GB (Chinese): 14/19 · 19/26 · 24/29 · 29/32
ISO: 14/19 · 19/26 · 24/29 · 29/32
ASTM (American): 14/20 · 19/22 · 24/40 · 29/42
• Flask capacity: 250ml (standard), 500ml, 1000ml
• Dropping funnel upgrade: Pressure-equalizing funnel (smoother addition)
• Add a heating mantle for heated reactions
• Upgrade to Kipp's apparatus for on-demand start-stop operation
• Mix and match — no minimum order quantity

💡 Recommended Add-Ons: Heating mantle · Gas jars · Glass wool · Thermometer · Rubber stoppers (various sizes)

Product Description

I. How Gas Generation Works

Laboratory gas preparation typically involves solid-liquid or liquid-liquid reactions — solid reactants (e.g., zinc granules, marble chips) are placed in the flask, liquid reactants (e.g., dilute hydrochloric acid, dilute sulfuric acid) are added dropwise through the dropping funnel, and the resulting gas is delivered through tubing for collection or direct use in subsequent experiments.

The key to this setup is controlling the reaction rate — the dropping funnel allows precise control over liquid addition, preventing the reaction from becoming too vigorous and producing gas too rapidly. For reactions requiring heat (e.g., chlorine preparation), a heating mantle provides temperature control.

✦ Two Gas Generation Modes:

Ambient Temperature: No heating mantle — relies on reaction exotherm or room temperature — suitable for H₂ (Zn + HCl), CO₂ (CaCO₃ + HCl).
Heated Reaction: Heating mantle placed under the flask — suitable for O₂ (KClO₃ + MnO₂), Cl₂ (MnO₂ + HCl).
Choose based on your target gas and reaction conditions.

II. What's in the Setup

Round-Bottom Flask — Reaction vessel; holds solid reactants; withstands heating
Dropping Funnel — Adds liquid reactants; controls reaction rate
Gas Delivery Tube — Delivers generated gas; can connect to wash bottles, drying tubes, or gas jars
Iron Stand & Universal Clamps — Secures the apparatus
Heating Mantle (optional) — For reactions requiring heat
Wash Bottle (optional) — Purifies gas; removes impurities
Gas Jar (optional) — Collects gas

III. Kipp's Apparatus — On-Demand Upgrade

For applications requiring a long-term, steady gas supply (e.g., hydrogen reduction experiments), the setup can be upgraded with a Kipp's Apparatus. Invented by Dutch chemist Petrus Jacobus Kipp, it consists of three parts: a spherical funnel, a vessel, and a delivery tube. Its key feature is on-demand, start-stop operation — opening the delivery tube stopcock brings liquid into contact with the solid to start gas generation; closing it allows gas pressure to push the liquid back into the spherical funnel, automatically stopping the reaction. Suitable for block solids reacting with liquids at ambient temperature, such as hydrogen, carbon dioxide, and hydrogen sulfide.

This kit is compatible with standard joint Kipp's apparatus — available as a separate add-on.

IV. Material & Workmanship

The flask, dropping funnel, and delivery tube are all made from borosilicate glass 3.3 — chemically resistant and thermally shock-resistant. All ground joints are precision-machined to the standard 1:10 taper for reliable sealing. The dropping funnel features a PTFE stopcock for smooth operation, acid/base resistance, and leak-proof performance.

Applications

Typical Applications

Hydrogen Preparation

Zinc granules + dilute sulfuric acid (or dilute hydrochloric acid) — for reduction reactions, hydrogenation

Carbon Dioxide Preparation

Marble chips (CaCO₃) + dilute hydrochloric acid — for fire extinguisher experiments, photosynthesis studies

Oxygen Preparation

Potassium chlorate (KClO₃) + manganese dioxide (MnO₂) with heating — for combustion experiments

Chlorine Preparation

Manganese dioxide (MnO₂) + concentrated hydrochloric acid with heating — for halogen property experiments

Hydrogen Sulfide Preparation

Ferrous sulfide (FeS) + dilute hydrochloric acid — for qualitative analysis

Gas	Density (air=1)	Water Solubility	Recommended Collection	Notes
Please contact us to confirm the available specifications.

Operation & Maintenance

User Guide

The key to gas generation is airtightness and reaction rate control. Here are the essential steps.

🚨 Three rules to remember:
① Check for leaks before starting — a leak means wasted effort
② Add solid first, then liquid — order matters
③ Don't open the dropping funnel all at once — add slowly to control the reaction rate

I. Before You Start

Check all glassware for cracks — cracked glass is unsafe
Check the dropping funnel stopcock — is it closed? Does it leak?
Check connections on the delivery tube for proper sealing
Check reactants — solid particles shouldn't be too large (larger particles slow the reaction)

Assembly sequence

Place solid reactants into the round-bottom flask
Secure the flask on the iron stand; insert the dropping funnel into the flask neck (ground joint connection)
Load liquid reactants into the dropping funnel and close the stopcock
Connect one end of the delivery tube to the flask (or distillation head), and the other end to the collection apparatus or wash bottle
Secure the flask and condenser with clamps — ensure the apparatus is vertical and stable
Check all ground joint connections for tightness

III. Leak Check

Close the delivery tube outlet (clamp the tubing or plug the end)
Open the dropping funnel stopcock and add a small amount of water
Observe the liquid level — if it doesn't drop, the system is airtight
If the level continues to drop, there's a leak — check all connections

IV. Starting the Reaction

Open the dropping funnel stopcock and add liquid slowly
Observe the reaction in the flask — bubbles, solid dissolving, color changes
Adjust the addition rate to control reaction speed — steady, continuous bubbles is the ideal state
Reaction too fast — close the stopcock and pause addition; too slow — increase the drip rate slightly

V. Gas Collection

Water Displacement: For gases insoluble in water (H₂, O₂, CO₂) — insert the delivery tube into an inverted gas jar submerged in the water trough
Upward Displacement: For gases denser than air (CO₂, Cl₂) — gas jar upright, tube inserted to the bottom
Downward Displacement: For gases lighter than air (H₂, NH₃) — gas jar inverted, tube inserted to the bottom
Work in a fume hood for toxic gases

VI. Shutdown

Close the dropping funnel stopcock first to stop addition
If the reaction has stopped, disassemble directly
If the reaction is still ongoing, close the delivery tube outlet first, then disassemble
Clean all glassware — dispose of reaction residues properly
Dry and store properly

📌 Loading order — why solid first:

Add solid before liquid — if you add liquid first, adding solid may cause splashing or sticking to the flask wall. For larger solid particles, place a layer of glass wool in the flask first to prevent small particles from entering the delivery tube.

💡 From a Seasoned Lab Hand:

"Gas generation has two main enemies — leaks and bumping."
Leaks — check all connections; apply vacuum grease to ground joints; tighten rubber tubing connections.
Bumping — caused by adding liquid too quickly, leading to a sudden surge of gas. Solution: add slowly through the dropping funnel, a few drops at a time, waiting for the reaction to stabilize before adding more.
Need to add more solid reactant? — remove the dropping funnel, add fresh solid through the flask neck, and reattach. Stop the reaction first before adding more solid.
How to check gas purity? — Water displacement gives relatively pure gas. For higher purity, pass the gas through a wash bottle before collection to remove impurities.

Care & Notes

Show care & notes

⚠️ Safety & Compliance Checklist

Always perform a leak check

a leak can release toxic gases with serious consequences

Toxic gases (Cl₂, SO₂, H₂S, etc.) must be handled in a fume hood

Hydrogen preparation — keep away from ignition sources

hydrogen-air mixtures are explosive

Do not

Heated reactions: use a heating mantle — never use an open flame with flammable gases
Waste disposal: dispose of reaction waste according to regulations — never pour down the drain
Never use cracked glassware

Gas Generation Apparatus

Specifications

Component List

Product Description

I. How Gas Generation Works

II. What's in the Setup

III. Kipp's Apparatus — On-Demand Upgrade

IV. Material & Workmanship

Applications

Hydrogen Preparation

Carbon Dioxide Preparation

Oxygen Preparation

Chlorine Preparation

Hydrogen Sulfide Preparation

User Guide

I. Before You Start

Assembly sequence

III. Leak Check

IV. Starting the Reaction

V. Gas Collection

VI. Shutdown

Care & Notes

Always perform a leak check

Toxic gases (Cl₂, SO₂, H₂S, etc.) must be handled in a fume hood

Hydrogen preparation — keep away from ignition sources

Need This Apparatus Kit?

Gas Generation Apparatus

Specifications

Component List

Product Description

I. How Gas Generation Works

II. What's in the Setup

III. Kipp's Apparatus — On-Demand Upgrade

IV. Material & Workmanship

Applications

Hydrogen Preparation

Carbon Dioxide Preparation

Oxygen Preparation

Chlorine Preparation

Hydrogen Sulfide Preparation

User Guide

I. Before You Start

Assembly sequence

III. Leak Check

IV. Starting the Reaction

V. Gas Collection

VI. Shutdown

Care & Notes

Always perform a leak check

Toxic gases (Cl₂, SO₂, H₂S, etc.) must be handled in a fume hood

Hydrogen preparation — keep away from ignition sources

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