Katie found a sample of an unknown solid. She performed a series of experiments to determine some of its properties. Her experiments are described in the chart below. Use the information to answer the following question.

Question

1. Heat the sample and determine at which temperature it changes state.
2. Expose the sample to an acid, a base, and water and observe the result.
3. Measure the volume and mass of the sample and divide them.
4. Place the sample in contact with oxygen gas and flame and observe the result

Which of the following is correct about Katie's experiments?

(1 point)
Responses

Experiments 3 and 4 were designed to find physical properties.
Experiments 3 and 4 were designed to find physical properties.

Experiments 1 and 2 were designed to find physical properties
Experiments 1 and 2 were designed to find physical properties

Experiments 2 and 4 were designed to find chemical properties.
Experiments 2 and 4 were designed to find chemical properties.

Experiments 1 and 3 were designed to find chemical properties.
Experiments 1 and 3 were designed to find chemical properties.

Answer 1

To analyze Katie's experiments:

1. Experiment 1 (Heating the sample to determine at which temperature it changes state): This experiment is focused on finding a physical property (melting point or boiling point).

2. Experiment 2 (Exposing the sample to an acid, a base, and water and observing the result): This experiment is designed to find chemical properties, as it involves chemical reactions with other substances.

3. Experiment 3 (Measuring the volume and mass of the sample, and dividing them to find density): This experiment is also aimed at determining a physical property (density).

4. Experiment 4 (Placing the sample in contact with oxygen gas and flame and observing the result): This experiment is intended to find out if the sample is combustible, which is a chemical property.

Now, looking at the response options:

• Experiments 3 and 4 were designed to find physical properties: Incorrect. Experiment 3 is physical; Experiment 4 is chemical.
• Experiments 1 and 2 were designed to find physical properties: Incorrect. Experiment 1 is physical; Experiment 2 is chemical.
• Experiments 2 and 4 were designed to find chemical properties: Correct. Both experiments focus on chemical reactions.
• Experiments 1 and 3 were designed to find chemical properties: Incorrect. Both are physical.

Therefore, the correct answer is:

Experiments 2 and 4 were designed to find chemical properties.