145k views
4 votes
During chemistry lab, Sal and Tim were trying to distinguish between physical and chemical changes. After mixing iron filings and sulfur together, they could still separate the iron with a magnet. When they heated the two elements, though, a hard, black substance formed and they could no longer separate the iron from the sulfur with a magnet. In their lab manual, they wrote the following equation to represent the change: Fe + S → FeS The second procedure produced a chemical reaction, but what type? Responses A synthesissynthesis B single replacementsingle replacement C decompositiondecomposition D double replacement

1 Answer

0 votes

The reaction "Fe + S → FeS" exemplifies a synthesis reaction, where iron and sulfur combine to form iron sulfide, distinctly representing the creation of a new compound. Here option A is correct.

The chemical reaction described in the scenario, represented by the equation "Fe + S → FeS," is an example of a synthesis reaction. In a synthesis reaction, two or more substances combine to form a new compound.

In this case, iron (Fe) and sulfur (S) react to produce iron sulfide (FeS). The formation of a hard, black substance (iron sulfide) indicates the creation of a new compound, which is characteristic of a synthesis reaction.

The other types of reactions listed are:

B - Single Replacement: Involves one element replacing another in a compound, but this doesn't apply to the given scenario.

C - Decomposition: Involves the breakdown of a compound into simpler substances, which is not the case here.

D - Double Replacement: Involves the exchange of ions between two compounds, and this also doesn't apply to the given reaction. Here option A is correct.

Complete question:

During chemistry lab, Sal and Tim were trying to distinguish between physical and chemical changes. After mixing iron filings and sulfur together, they could still separate the iron with a magnet. When they heated the two elements, though, a hard, black substance formed and they could no longer separate the iron from the sulfur with a magnet. In their lab manual, they wrote the following equation to represent the change: Fe + S → FeS The second procedure produced a chemical reaction, but what type? Responses

A - synthesissynthesis

B - single replacementsingle replacement

C - decompositiondecomposition

D - double replacement

User Asplund
by
8.2k points