Question

value: 6
match the description with the chemical reaction type.
a. this type of reaction relates to the ph of a solution.
b. two or more atoms or molecules combine to form a new molecule.
c. a molecule is broken down into smaller molecules, or atoms.
d. refers to the formation of an insoluble salt when two salt solution , containing dissolved salt ions, are combined

1. acid - base
2. precipitation
3. synthesis
4. decomposition

Explanation:

• For option a: Acid - base reactions involve the transfer of protons (H⁺ ions) and are related to the pH of a solution (since pH is a measure of the hydrogen ion concentration). So a matches with 1 (Acid - base).
• For option b: In a synthesis reaction, two or more substances (atoms or molecules) combine to form a single, more complex substance. So b matches with 3 (Synthesis).
• For option c: A decomposition reaction is the opposite of a synthesis reaction, where a single compound breaks down into two or more simpler substances (smaller molecules or atoms). So c matches with 4 (Decomposition).
• For option d: A precipitation reaction occurs when two solutions containing dissolved ions are mixed, and an insoluble salt (precipitate) is formed. So d matches with 2 (Precipitation).

Answer:

a. 1. Acid - base
b. 3. Synthesis
c. 4. Decomposition
d. 2. Precipitation