reaction 3: Silver and nitrate and sodium chloride.

Question

Two clear liquids: Silver nitrate solution and sodium chloride solution. A white precipitation forms (a powdery substance that settles to the bottom). was this a chemical reaction or a physical reaction? How do you know?

Answer 1

The reaction between silver nitrate \( \text{AgNO}_3 \) and sodium chloride \( \text{NaCl} \) is a chemical reaction. The formation of a white precipitate, which is silver chloride \( \text{AgCl} \), indicates that a new substance has been created as a result of the chemical reaction.

Here are some reasons why this is classified as a chemical reaction:

1. Formation of a New Substance: The white precipitate is a new compound (silver chloride) that forms from the reactants (silver nitrate and sodium chloride). This change in composition indicates a chemical reaction has occurred.

2. Changes in Properties: The properties of the reactants (clear solutions) are different from those of the product (a solid precipitate). This alteration in physical state and properties is characteristic of chemical reactions.

3. Involvement of Ionic Exchange: In this reaction, there is an exchange of ions between the reactants. The silver ions \( \text{Ag}^+ \) from silver nitrate combine with the chloride ions \( \text{Cl}^- \) from sodium chloride to form silver chloride \( \text{AgCl} \), which is insoluble in water.

In summary, since a new substance is formed along with a change in the physical state, it is a chemical reaction.

Answer 2

write a hypothesis about it use if - then

Answer 3

Hypothesis:

If silver nitrate solution and sodium chloride solution are mixed together, then a white precipitate of silver chloride will form, indicating a chemical reaction has occurred between the two solutions.