Which of the reactions below are combination, or synthesis, reactions? (A synthesis reaction is where two or more reactants combine to form a single product.)
To determine which reactions are combination or synthesis reactions, we need to identify if two or more reactants combine to form a single product. Here are the reactions:
1) N₂ + 3H₂ → 2NH₃ - This is a combination or synthesis reaction because nitrogen gas (N₂) and hydrogen gas (H₂) react to form ammonia (NH₃).
2) 2H₂ + O₂ → 2H₂O - This is not a combination or synthesis reaction. It is a combustion reaction where hydrogen gas (H₂) and oxygen gas (O₂) react to form water (H₂O).
3) 2Na + Cl₂ → 2NaCl - This is a combination or synthesis reaction because sodium (Na) and chlorine (Cl₂) combine to form sodium chloride (NaCl).
4) Mg + 2HCl → MgCl₂ + H₂ - This is not a combination or synthesis reaction. It is a single displacement or replacement reaction where magnesium (Mg) reacts with hydrochloric acid (HCl) to form magnesium chloride (MgCl₂) and hydrogen gas (H₂).
Therefore, the reactions 1) and 3) are combination or synthesis reactions.
To determine which reactions are combination or synthesis reactions, we need to examine each reaction and identify if they fit the definition of a synthesis reaction, where two or more reactants combine to form a single product. Here are the reactions:
1. A + B → AB
2. 2H2 + O2 → 2H2O
3. Na + Cl2 → NaCl
4. 2Mg + O2 → 2MgO
To analyze each reaction, we need to identify the reactants and the products involved. In a combination or synthesis reaction, the reactants combine to form a single product.
1. Reaction 1: A + B → AB
This reaction involves reactants A and B, and they combine to form a product AB. This fits the definition of a combination or synthesis reaction.
2. Reaction 2: 2H2 + O2 → 2H2O
In this reaction, reactants 2H2 and O2 combine to produce the product 2H2O. Therefore, this reaction is a combination or synthesis reaction.
3. Reaction 3: Na + Cl2 → NaCl
Here, the reactants Na and Cl2 react to form the product NaCl. This is another example of a combination or synthesis reaction.
4. Reaction 4: 2Mg + O2 → 2MgO
In this reaction, the reactants 2Mg and O2 combine to create the product 2MgO. Thus, this reaction also falls under the category of a combination or synthesis reaction.
In summary, all four reactions given are combination or synthesis reactions since they involve two or more reactants combining to form a single product.
To identify which reactions are combination or synthesis reactions, you need to determine if two or more reactants combine to form a single product. Here are some examples of combination/synthesis reactions:
1. 2H₂ + O₂ → 2H₂O
This reaction involves the combination of two hydrogen molecules (H₂) with one oxygen molecule (O₂) to produce two water molecules (H₂O). This is a synthesis reaction.
2. N₂ + 3H₂ → 2NH₃
In this reaction, nitrogen gas (N₂) combines with hydrogen gas (H₂) to produce ammonia (NH₃). This is also a synthesis reaction.
3. Mg + O₂ → 2MgO
This reaction illustrates the combination of magnesium metal (Mg) with oxygen gas (O₂) to create magnesium oxide (MgO). It is a synthesis reaction.
These are just a few examples of combination or synthesis reactions. It is important to note that any reaction where two or more reactants combine to produce a single product can be classified as a synthesis reaction.