Preparation of HCl gas in Acids, Bases and Salts – Class 10 Science Experiment

Chapter Name: Acids, Bases and Salts

Activity Name: Preparation of HCl gas in Acids, Bases and Salts

Activity Description:

Preparation of HCl gas in Acids, Bases and Salts - Class 10 Science Experiment
Preparation of HCl gas in Acids, Bases and Salts - Class 10 Science Experiment
Preparation of HCl gas in Acids, Bases and Salts - Class 10 Science Experiment

This experiment involves the preparation of hydrogen chloride (HCl) gas by reacting solid sodium chloride (NaCl) with concentrated sulfuric acid (H2SO4) in a test tube. The gas evolved is then tested with dry and wet blue litmus paper to observe its acidic properties. The HCl gas is also shown to dissociate in water to form hydronium ions (H3O+).

Required Items:

  1. Solid sodium chloride (NaCl)
  2. Concentrated sulfuric acid (H2SO4)
  3. Test tube
  4. Delivery tube
  5. Dry and wet blue litmus paper
  6. Guard tube (containing calcium chloride) – optional, for humid climates

Step by Step Procedure:

  1. Take about 1.0g of solid NaCl and place it in a clean and dry test tube.
  2. Add some concentrated sulfuric acid to the test tube containing NaCl.
  3. Observe the reaction and check if there is a gas coming out of the delivery tube.
  4. Test the gas evolved with dry and wet blue litmus paper separately.
  5. Note the changes in the color of the litmus paper.
  6. If required, pass the gas through a guard tube containing calcium chloride to dry the gas.
  7. Write the chemical equation for the reaction taking place at the mouth of the delivery tube.

Experiment Observations:

  • Gas evolved during the reaction (HCl gas).
  • Dry litmus paper: No change in color.
  • Wet blue litmus paper: Turns red.

Precautions:

  1. Handle concentrated sulfuric acid with care as it is corrosive.
  2. Perform the experiment in a well-ventilated area or under a fume hood.
  3. Use dry and wet blue litmus paper separately to test the gas.
  4. In humid climates, use a guard tube with calcium chloride to dry the gas.

Lesson Learnt from Experiment:

Dry HCl gas (hydrogen chloride) does not show acidic properties since it does not change the color of dry litmus paper. However, when HCl gas dissolves in water, it forms hydronium ions (H3O+) and exhibits acidic behavior, turning wet blue litmus paper red.

Science Experiment Kits for Kids

Photo Title Price Buy
Einstein Box Junior...image Einstein Box Junior Science Gift Set | 2-in-1 Set of My First Science Kit & Slime Kit for 4-6-8 Year Olds| Birthday Gift for Boys & Girls ₹1,199.00
ButterflyEdufields 20+ Science...image ButterflyEdufields 20+ Science Kit For Kids | STEM Projects birthday gift For Boys and Girls Ages 7-8-10-12 |DIY Educational & Learning Experiment Toys for 7 To 12 Year Olds | Build 20+ Motor Machines ₹1,699.00
The Little Ones...image The Little Ones Science Kit - Science experiment kit for kids 6-8-10-12 years old,educational learning toys,Best gift for boys&girls,chemistry kit,science project[Complete science kit- 100+experiment]
WitBlox AI Artificial...image WitBlox AI Artificial Intelligence Robotic Science Kit for 101+ Project 137 Part 8 Yrs+, Interlocking Bricks, Electronic Sensor & Circuits to create Logic 2 Free Live Classes Gift Toy for Boys & Girls ₹3,700.00
Avishkaar Robotics Advanced...image Avishkaar Robotics Advanced Kit|150-In-1 DIY Stem Metal Kit|Multicolor|150+ Parts|Learn Robotics|Coding & Mechanical Design|for Kids Aged 10-14|Made in India|Educational DIY Stem Kit|Made in India ₹10,199.00
My Science Lab...image My Science Lab Ultimate Science Experiment Kit for Kids Age 6-14 | STEM Toys | Physics Kit Set | Science & Fun 5-in-1 Projects | School Science Kit | Best Educational Birthday Gift Toys for Boys and Girls ₹1,199.00

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *