we did a lab on chemical change, where we had to see how a chemical change affcts mass. so we measure the mass of 20ml of copper solution, and 2cm(cubed) of steel wool, and then we mixed them into a flask. soon the steel wool turned rusy, and broke apart. and the duofilm(which is a strtchy rubery lid) popped up as tho gas was produced.

then we had to answer some questions:here is the question i need help with.

sometimes in an experiment there are flaws due to lack of design and materials, therefore causing mistakes. what are 3 sources of errors in the experiment that might cause a change in the outcome of the chemical change, and name 3 ways to fix them.

In your chemical change lab, there are several potential sources of errors that could influence the outcome. Here are three examples and ways to address them:

1. Measurement errors:
- Source of error: inaccurate measurements of the copper solution and steel wool.
- Solution: Ensure the use of precise measuring instruments, such as calibrated beakers and a digital balance, to accurately measure the required quantities of materials.

2. Contamination:
- Source of error: presence of impurities or foreign substances in either the copper solution or steel wool.
- Solution: Clean all equipment thoroughly before starting the experiment and use high-purity chemicals to minimize contamination.

3. Incomplete reaction:
- Source of error: insufficient mixing or inadequate reaction time.
- Solution: Increase the mixing intensity by shaking or stirring the flask thoroughly, and allow sufficient time for the reaction to complete before analyzing the results.

Remember that these examples are hypothetical and may not necessarily reflect the specific errors in your experiment. It's important to consider potential errors that are specific to your setup and materials used.