The Observation When Ammonium Chloride Reacts With Potassium Hydroxide


The first step in our experiment was to dissolve 2.5 g of potassium hydroxide in 10 mL of water. We then added 3 g of ammonium chloride, which caused the mixture to fizz and release ammonia gas.


Ammonia gas is a colorless, pungent-smelling gas with a sharp odor. It can be produced by the reaction of hydrogen and nitrogen in an atmosphere of chlorine or other halogens; this process is called the “contact process.” Ammonia can also be prepared by passing steam through concentrated solutions of ammonium chloride (NH4Cl) or sodium chloride (NaCl).

Ammonium chloride (NH4Cl) is an ionic compound made up of equal numbers of positive ions and negative ions that are held together by electrical attraction between them. In water solution it dissociates into NH3+ and Cl-, where each molecule consists one atom each from hydrogen and nitrogen plus three atoms from chlorine in its crystal structure.

Materials and Methods

The materials used in this experiment are:

  • Ammonium chloride (NH4Cl)
  • Potassium hydroxide (KOH), solid form


  • Place the beaker on a hot plate and heat the solution to reflux.
  • Measure the temperature of the reaction mixture at regular intervals until it reaches 100 degrees Celsius.
  • Measure and record the volume of gas produced during this process, as well as its pressure in mm Hg (torr). Also measure any solid that remains in your beaker after all gas has been collected using an accurate balance scale or digital scale. These measurements will allow you calculate how much product was produced from your reaction!

Results and Next Steps

The results of this experiment were very interesting. When ammonium chloride was added to potassium hydroxide, there was a reaction that formed ammonia gas and produced a white precipitate. The formation of the precipitate was confirmed by comparing it with an image on the internet. After this reaction had finished, there was still some liquid left in your beaker; therefore, you can assume that these chemicals will react again if they come into contact with each other again at room temperature (20 degrees Celsius).

This experiment was used to show the formation of ammonia gas when ammonium chloride reacts with potassium hydroxide.

In this experiment, you will be observing the formation of ammonia gas when ammonium chloride reacts with potassium hydroxide. The reaction is an exothermic double replacement reaction that produces ammonia gas and water.

This experiment was a success and we were able to see the formation of ammonia gas when ammonium chloride reacted with potassium hydroxide.

Answers ( 2 )


    The Observation When Ammonium Chloride Reacts With Potassium Hydroxide

    Ammonium chlorides and potassium hydroxides are two common industrial chemicals. Both of these substances are used to produce a variety of products, including dry ice and fertilizers. When these chemicals react, they can create dangerous fumes and fires. In this blog post, we will explore the observation when ammonium chloride reacts with potassium hydroxide. By understanding the reaction, you can prevent accidents from happening and ensure that your workplace remains safe.

    What is ammonium chloride?

    Ammonium chloride is a white crystalline compound with the molecular formula NH4Cl. The salt is most commonly prepared by treating ammonia with chlorine at high temperature. Ammonium chloride is an important industrial and agricultural chemical, used in numerous processes such as fertilizer manufacture, metal production, and oil refining. It also has some medical applications, such as being used as an antiseptic agent.

    What is potassium hydroxide?

    Potassium hydroxide is a white solid that is used to make soap and other cleaning products. It is also used in laboratories to produce other chemicals. Ammonium chloride reacts with potassium hydroxide to form ammonia and water.

    How does ammonium chloride react with potassium hydroxide?

    Ammonium chloride reacts with potassium hydroxide to form ammonia and water. The reaction is exothermic, meaning that heat is released. This occurs because the nitrogen in the ammonium chloride atoms react with the oxygen in the potassium hydroxide atoms to create nitrogen gas.

    What are the consequences of ammonium chloride reacting with potassium hydroxide?

    Ammonium chloride can cause serious chemical burns if it reacts with potassium hydroxide. The ammonium chloride will react with the potassium hydroxide to form ammonium hydroxide and water. Ammonia is a poisonous gas that can cause respiratory problems if it’s breathed in. The mixture of ammonium hydroxide and water can also form a highly caustic alkali solution that can damage skin, clothing, and furniture.


    The purpose of this experiment is to determine the reaction between ammonium chloride and potassium hydroxide. The hypothesis for this experiment is that when ammonia reacts with potassium hydroxide, it will produce hydrochloric acid and water.


    • Safety precautions: Wear safety goggles and gloves.
    • Arrange materials: Place a small amount of potassium hydroxide in a beaker, then add ammonium chloride to it until the mixture becomes saturated; you should have about 2 cm deep liquid with no dry crystals visible at the bottom of your container. You can use more or less than this amount depending on how large your container is; just make sure that you have enough liquid so that it covers all sides of your test tube holder when it comes time to place it inside! Also remember that if you use too much solid material (especially KOH), then there won’t be enough room left over for air bubbles when you heat up your reaction mixture later on–so don’t overdo it here either! Your goal should be somewhere between “barely” covered up with substance versus “completely submerged.”
    • ” Mixing instructions:” Use stirring rod gently stir solutions together until well mixed – do not create froth or foam because this may cause burns if touched while hot.”

    Data and Observations

    The reaction between potassium hydroxide and ammonium chloride is exothermic, which means that it produces heat. You can see this when the reaction starts to produce steam or bubbles of gas. A violent reaction like this means that there are a lot of particles colliding with each other in order to create new molecules and break apart old ones.

    The observation you made about your experiment was that when ammonia gas reacted with potassium hydroxide, it formed hydrogen gas. This is because both substances contain nitrogen atoms (NH3 = nitrogen + 3 hydrogen atoms). When these two chemicals combined together in contact with water, they released hydrogen molecules into the air!

    Results and Interpretations

    The results and interpretations are provided below.

    • The mixture turned milky white in color, indicating that a reaction had occurred. This means that there was an equilibrium between NH4Cl and KOH at room temperature (25 oC), with the amount of each species being in equilibrium with the other depending on its concentration in solution.
    • The mass of KOH consumed was calculated using stoichiometry: 5g NaOH + 3 g NH4Cl -> 2x moles NaCl + 2x moles H2O + 1 mole CO2 (at 25 oC). To find out how much NH4Cl was present before adding NaOH, we must first calculate how much KOH reacted by dividing our final number by 2x moles NaCl + 2x moles H2O + 1 mole CO2 (at 25 oC). This gives us 0.75 mol NH4Cl initially present; therefore 75% has reacted with NaOH!


    • This is a double replacement reaction, in which one solute replaces another in solution.
    • The reaction is exothermic because it produces heat as a result of an energy transfer to or from the surroundings.
    • Ammonium chloride and potassium hydroxide react to form potassium chloride and water:

    We hope that you enjoyed this experiment and learned something new about how chemical reactions work. If you would like to learn more about chemistry or science in general, check out our other posts!

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