Classify the reaction
(NH4)2Cr2O7 ! N2 + 4 H2O + Cr2O3
as one or more of the following:
Z1) combination Z4) metathesis
Z2) decomposition Z5) displacement
Z3) redox
1. Z2 only
2. Z2 and Z5 only
3. Z2 and Z3 only
4. Z3 and Z5 only
5. Z1 and Z3 only
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I assume ! stands for an arrow. Arrows are written easily either --> or ==>.
The reaction shown is a decomposition. Also it is a redox reaction.
The reaction (NH4)2Cr2O7 → N2 + 4 H2O + Cr2O3 can be classified as Z2 (decomposition) and Z3 (redox) reactions.
Z2 (decomposition) refers to a reaction in which a compound breaks down into simpler substances. In this reaction, (NH4)2Cr2O7 decomposes into N2, H2O, and Cr2O3.
Z3 (redox) refers to a reaction involving a transfer of electrons between reactants. In this reaction, chromium undergoes a change in oxidation state from +6 in (NH4)2Cr2O7 to +3 in Cr2O3. Therefore, it is a redox reaction.
To summarize, the correct answer is option 3: Z2 and Z3 only.
To classify the reaction, you need to determine the types of chemical reactions that are occurring. Here's how you can analyze the given reaction:
(NH4)2Cr2O7 → N2 + 4 H2O + Cr2O3
Step 1: Identify the reactants and products:
Reactants: (NH4)2Cr2O7
Products: N2, H2O, Cr2O3
Step 2: Look for any changes in the number of atoms or elements:
In this reaction, it can be seen that the reactant (NH4)2Cr2O7 decomposes into multiple products.
Step 3: Determine the types of reactions:
Z1) Combination: Two or more substances combine to form a single compound.
Z2) Decomposition: A compound breaks down into two or more simpler substances.
Z3) Redox: Involves a transfer of electrons between species, resulting in a change in oxidation states.
Z4) Metathesis: Cations and anions of two different compounds switch places.
Z5) Displacement: An atom or an ion is replaced by another atom or ion.
Analyzing the given reaction:
- The reactant (NH4)2Cr2O7 decomposes into multiple products, N2, H2O, and Cr2O3. This indicates a decomposition reaction. Therefore, Z2 is present.
- There is no indication of combination, metathesis, or displacement reactions based on the given information.
- To determine if the reaction involves a redox process, you need to examine the change in oxidation states for the atoms involved.
Upon analyzing the reaction, you can see that chromium (Cr) is reduced from an oxidation state of +6 in (NH4)2Cr2O7 to +3 in Cr2O3. Therefore, a redox process is occurring. Hence, Z3 is also present.
From the analysis, the reaction can be classified as Z2 (decomposition) and Z3 (redox), making the answer option 3: Z2 and Z3 only.