how will you recognize that a singe replace reaction has occured when you combine an active metal with 6M HCI
H2, a gas, will be evolved.
To determine whether a single replacement reaction has occurred when combining an active metal with 6M HCl (hydrochloric acid), you can follow these steps:
1. Identify the active metal: First, you need to know the specific active metal you are working with. Active metals include elements like sodium (Na), potassium (K), calcium (Ca), magnesium (Mg), and others.
2. Understand the concept: In a single replacement reaction, the active metal from a compound replaces another less reactive metal from a second compound. The metal in the compound being displaced will be reduced, while the active metal will be oxidized.
3. Write the balanced chemical equation: In the case of combining an active metal with 6M HCl, the reaction can be represented by the following formula:
Active metal (M) + HCl → Salt (MX) + Hydrogen (H₂)
4. Observe gas evolved: During the reaction, hydrogen gas (Hâ‚‚) will be evolved as a result of the displacement. The formation of gas bubbles will indicate that a reaction has occurred.
5. Test for hydrogen gas: Hydrogen gas can be identified by its characteristic properties. One way to test for the presence of hydrogen gas is by holding a lit splint near the reaction mixture. If the gas produced is hydrogen, it will ignite with a "pop" sound.
By following these steps, you can recognize that a single replacement reaction has occurred when an active metal reacts with 6M HCl by observing the evolution of gas and performing the hydrogen gas test.