Materials:

Epsom salts (MgSO4),
ammonia (NH4OH)
small jar or cup
measuring cup
Procedures
1. Dissolve 1 teaspoon of Epsom salts in a half cup of water.
2. Add 2 teaspoons of ammonia to the Epsom salts solution and stir thoroughly. Record
your observations.
3. Allow the mixture to stand for 30 minutes and record your observations.

What evidence was there to indicate that the Epsom salts and ammonia reacted?

To determine whether the Epsom salts and ammonia reacted, you need to observe any changes in the mixture before and after mixing them together. Here is how you can analyze the evidence:

1. Start by dissolving 1 teaspoon of Epsom salts (MgSO4) in a half cup of water as instructed. Make sure the Epsom salts are completely dissolved in the water.

2. Next, add 2 teaspoons of ammonia (NH4OH) to the Epsom salts solution. Stir the mixture thoroughly to ensure proper mixing.

3. Record your observations after adding the ammonia. Look for any changes in color, odor, or the appearance of solid precipitates. Take note if any bubbles or gas formation occurs.

4. Allow the mixture to stand for 30 minutes without disturbing it. During this time, continue recording any changes happening in the solution.

5. After the 30 minutes have elapsed, carefully observe the solution again. Look for any further changes that may have occurred.

Based on your observations, consider the following evidence that may indicate a reaction occurred:

- Color change: Did the solution change in color after mixing Epsom salts and ammonia? Note if the color became lighter, darker, or if it changed entirely.
- Precipitate formation: Did any solid particles or precipitates appear in the solution? This could indicate a chemical reaction occurred.
- Gas formation: Did you see any bubbles or observe gas being released when the Epsom salts and ammonia were mixed? This could be a sign of a reaction.

It is important to compare your observations to the initial Epsom salts solution to identify any significant changes that may have occurred as a result of the interaction between Epsom salts and ammonia.